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Naturvitenskap
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Uorganiske gasser
Edelgasser
Helium
Preferred term
553.971
Helium
Broader concept
553.97
Edelgasser
Entry terms
Helium--økonomisk geologi
Identifier
ocd00147930
Notation
553.971
URI
http://dewey.info/class/553.971/e23/
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Created 2/4/10, last modified 7/26/18