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https://demo.triply.cc/lib-uiowa/sa/vocab/
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periodical
https://demo.triply.cc/lib-uiowa/sa/vocab/periodical
rdfs:label
http://www.w3.org/2000/01/rdf-schema#label
Periodical
@en
graph:vocab
https://triplydb.com/lib-uiowa/sa/graphs/vocab