https://vocabularyserver.com/bll/en/https://vocabularyserver.com/bll/en/xml.php?skosTema=1617Weight (expression of) https://vocabularyserver.com/bll/en/xml.php?skosTema=1617 Lexical field BT https://vocabularyserver.com/bll/en/xml.php?skosTema=1617 expression of UF