https://vocabularyserver.com/icpsr/ ICPSR Subject Thesaurus Interuniversity Consortium for Political and Social Research social science subject terms Interuniversity Consortium for Political and Social Research 2006-07-26 en 2006-07-26 00:00:00 election districts 2006-07-26 00:00:00 voting districts https://vocabularyserver.com/icpsr/xml.php?skosTema=628https://vocabularyserver.com/icpsr/xml.php?skosTema=647https://vocabularyserver.com/icpsr/xml.php?skosTema=1056https://vocabularyserver.com/icpsr/xml.php?skosTema=2574