https://vocabularyserver.com/psh/en/ Polythematic Structured Subject Heading System National Technical Library National Technical Library 1998-12-31 en 2012-03-20 15:17:39 mechanical engineering 2012-03-20 15:17:39https://vocabularyserver.com/psh/en/xml.php?skosTema=2026https://vocabularyserver.com/psh/en/xml.php?skosTema=1605https://vocabularyserver.com/psh/en/xml.php?skosTema=1849https://vocabularyserver.com/psh/en/xml.php?skosTema=2276https://vocabularyserver.com/psh/en/xml.php?skosTema=1740https://vocabularyserver.com/psh/en/xml.php?skosTema=2129https://vocabularyserver.com/psh/en/xml.php?skosTema=2255https://vocabularyserver.com/psh/en/xml.php?skosTema=2274https://vocabularyserver.com/psh/en/xml.php?skosTema=1993https://vocabularyserver.com/psh/en/xml.php?skosTema=1657https://vocabularyserver.com/psh/en/xml.php?skosTema=2298https://vocabularyserver.com/psh/en/xml.php?skosTema=1611https://vocabularyserver.com/psh/en/xml.php?skosTema=1715https://vocabularyserver.com/psh/en/xml.php?skosTema=1607https://vocabularyserver.com/psh/en/xml.php?skosTema=2218https://vocabularyserver.com/psh/en/xml.php?skosTema=1440https://vocabularyserver.com/psh/en/xml.php?skosTema=1612https://vocabularyserver.com/psh/en/xml.php?skosTema=1781https://vocabularyserver.com/psh/en/xml.php?skosTema=2254https://vocabularyserver.com/psh/en/xml.php?skosTema=1532https://vocabularyserver.com/psh/en/xml.php?skosTema=1629https://vocabularyserver.com/psh/en/xml.php?skosTema=2277https://vocabularyserver.com/psh/en/xml.php?skosTema=1406https://vocabularyserver.com/psh/en/xml.php?skosTema=1625https://vocabularyserver.com/psh/en/xml.php?skosTema=1772https://vocabularyserver.com/psh/en/xml.php?skosTema=1602https://vocabularyserver.com/psh/en/xml.php?skosTema=1620https://vocabularyserver.com/psh/en/xml.php?skosTema=1855https://vocabularyserver.com/psh/en/xml.php?skosTema=2303https://vocabularyserver.com/psh/en/xml.php?skosTema=1886https://vocabularyserver.com/psh/en/xml.php?skosTema=2088https://vocabularyserver.com/psh/en/xml.php?skosTema=2005https://vocabularyserver.com/psh/en/xml.php?skosTema=2172https://vocabularyserver.com/psh/en/xml.php?skosTema=1685https://vocabularyserver.com/psh/en/xml.php?skosTema=1381https://vocabularyserver.com/psh/en/xml.php?skosTema=2103https://vocabularyserver.com/psh/en/xml.php?skosTema=2101