https://vocabularyserver.com/udc/en/ Universal Decimal Classification UDC Consortium UDC Consortium 2019-03-06 en 2019-03-06 15:43:54 Work science (work studies) in forestry. Harvesting of wood: logging and transport. Forest engineering 2019-03-06 15:43:54https://vocabularyserver.com/udc/en/xml.php?skosTema=1746