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Naturvitenskap
Geovitenskap
Økonomisk geologi
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Edelsteiner
Halvedelsteiner
Opaler
Preferred term
553.873
Opaler
Broader concept
553.87
Halvedelsteiner
Entry terms
Opaler--økonomisk geologi
Identifier
ocd00147921
Notation
553.873
URI
http://dewey.info/class/553.873/e23/
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Created 2/4/10, last modified 7/26/18