Thema – the subject category scheme for a global book trade

  1. Ga
  2. Gabon
  3. Gaborone
  4. Gaelic football
  5. Galapagos Islands
  6. Galaxies & stars
  7. Galicia, Autonomous Community of
  8. Galician (Gallego, Galego)
  9. Gallura
  10. Galway
  11. Gambia
  12. Gambling: theories & methods
  13. Game theory
  14. Games development & programming
  15. Ganges river & tributaries
  16. Gansu
  17. Gap
  18. Gard
  19. Garden design & planning
  20. Gardening
  21. Gardening with native plants
  22. Gardening: flowers & ornamental plants
  23. Gardening: fruit & vegetable
  24. Gardening: pests & diseases
  25. Gardening: plants & cultivation guides
  26. Gardening: trees & shrubs
  27. Gardens (descriptions, history etc)
  28. Garfagnana
  29. Gas technology
  30. Gascony
  31. Gästrikland
  32. Gastroenterology
  33. Gastrointestinal & colorectal surgery
  34. Gatineau
  35. Gaul
  36. Gaulish
  37. Gauteng
  38. Gävle
  39. Gay & Lesbian studies / LGBTQ studies
  40. Gaza
  41. Gelderland
  42. Gender studies, gender groups
  43. Gender studies: men & boys
  44. Gender studies: transgender, transsexual, intersex people
  45. Gender studies: women & girls
  46. Gender violence
  47. Gene therapy
  48. Genealogy, heraldry, names & honours
  49. General & world history
  50. General cookery & recipes
  51. General encyclopaedias
  52. General practice
  53. General studies
  54. General surgery
  55. Generational sagas
  56. Genetic engineering
  57. Genetics (non-medical)
  58. Geneva
  59. Genoa
  60. Genocide & ethnic cleansing
  61. Geochemistry
  62. Geographical discovery & exploration
  63. Geographical information systems & remote sensing
  64. Geographical maps (specialist)
  65. Geographical reference works
  66. Geography
  67. Geology, geomorphology & the lithosphere
  68. Geometry
  69. Geomorphology & geological surface processes
  70. Geophysics
  71. Geopolitics
  72. Georgetown
  73. Georgia
  74. Georgia (US State)
  75. Georgian
  76. Georgian era (1714–1837)
  77. Georgian style
  78. Geriatric medicine
  79. Geriatric nursing
  80. German
  81. German Autumn, 1977
  82. German Baltic Sea coast & islands
  83. German North Sea coast & islands
  84. German, Middle High
  85. German, Old High
  86. Germanic & Scandinavian languages
  87. Germany
  88. Germany: National Socialist period (1933–1945)
  89. Germany: Protest of 1968
  90. Germany: the age of Absolutism & Enlightenment (1648–1779)
  91. Germany: the age of Imperialism (1890–1914)
  92. Germany: the age of the European Revolutions (1780–1848)
  93. Germany: the ancient / classical world (c 800 BCE to c 500 CE)
  94. Germany: the Cold War era (1945–1990)
  95. Germany: Weimar Republic (1918–1933)
  96. Gers
  97. Gettysburg
  98. Gex
  99. Gévaudan
  100. Ghana
  101. Gharbia
  102. Ghent
  103. Ghosts & poltergeists
  104. Giant’s Causeway, North Antrim Coast & the Glens
  105. Gibraltar
  106. Gift books
  107. Gifu
  108. Gijon
  109. Gilbert Islands
  110. Girona (City)
  111. Girona (Province)
  112. Girona: Places of interest
  113. Gironde
  114. Giving up smoking
  115. Giza
  116. Glacier National Park
  117. Glaciers & ice caps
  118. Glarus / Glaris / Glarona / Glaruna
  119. Glasgow
  120. Glastonbury
  121. Globalization
  122. Gloucestershire
  123. Gnosticism
  124. Goa
  125. Gobi desert
  126. Goes
  127. Goias
  128. Golf
  129. Gorizia
  130. Götaland
  131. Gothenburg
  132. Gothenburg archipelago
  133. Gothic
  134. Gotland
  135. Gourdon
  136. Government powers
  137. Gozo
  138. Graduation
  139. Grammar, syntax & morphology
  140. Gran Canaria
  141. Granada (City)
  142. Granada (Province)
  143. Granada: Places of interest
  144. Grand Canyon
  145. Grand Canyon National Park
  146. Grand Teton National Park
  147. Grand-Est
  148. Grand-Est: Places of interest
  149. Graphic design
  150. Graphic novel & Comic book: genres
  151. Graphic novel & Comic book: types
  152. Graphic novel & comic books: guides & reviews
  153. Graphic novel & Manga artwork
  154. Graphic novel / Comic book: action & adventure
  155. Graphic novel / Comic book: adult
  156. Graphic novel / Comic book: adult – erotic
  157. Graphic novel / Comic book: adult – extreme violence / gore
  158. Graphic novel / Comic book: anthropomorphic / animal stories
  159. Graphic novel / Comic book: crime, mystery & thrillers
  160. Graphic novel / Comic book: fantasy, esoteric
  161. Graphic novel / Comic book: historical
  162. Graphic novel / Comic book: horror
  163. Graphic novel / Comic book: humorous
  164. Graphic novel / Comic book: inspired by or adapted from
  165. Graphic novel / Comic book: literary adaptations
  166. Graphic novel / Comic book: memoirs, true stories & non-fiction
  167. Graphic novel / Comic book: romance
  168. Graphic novel / Comic book: school / college life
  169. Graphic novel / Comic book: science fiction
  170. Graphic novel / Comic book: super-heroes & super-villains
  171. Graphic novel / Comic book: Westerns
  172. Graphic novels, Comic books, Cartoons
  173. Graphical & digital media applications
  174. Graphics programming
  175. Graphology
  176. Grasse
  177. Graubünden / Grisons / Grigioni / Grischun
  178. Gravity
  179. Great Barrier Reef
  180. Great Dividing Range mountains
  181. Great Hungarian plain
  182. Great Lakes
  183. Great Plain & the North
  184. Great Rift Valley
  185. Great Salt Lake
  186. Great Smoky Mountains National Park
  187. Greece
  188. Greek Islands
  189. Greenhouses, conservatories, patios
  190. Greenland
  191. Greenwich Village
  192. Grenada
  193. Grenoble
  194. Grid & parallel computing
  195. Grid computing
  196. Groningen
  197. Groningen (province)
  198. Grosseto
  199. Groupings linked by seas
  200. Groups & group theory