https://vocabularyserver.com/tgm1/ Thesaurus for Graphic Materials 1: Subject Terms Library of Congress. Prints and Photographs Division Graphic Materials, Subject Terms Library of Congress. Prints and Photographs Division 2007-07-04 en 2007-08-14 23:45:03 Census 2007-08-14 23:45:03 Population surveys https://vocabularyserver.com/tgm1/xml.php?skosTema=2969https://vocabularyserver.com/tgm1/xml.php?skosTema=421https://vocabularyserver.com/tgm1/xml.php?skosTema=10402