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National Agricultural Library Thesaurus
The NAL Thesaurus is an online vocabulary tool of agricultural terms in English and Spanish and is cooperatively produced by the National Agricultural Library, USDA and the... -
lexinfo
Ontology of lexical categories -
Chronicling America
Chronicling America provides access to information about historic newspapers and select digitized newspaper pages. 140,000 newspapers, 3.2 million pages. Issues The statistics...