Fonti Treccani.itTreccani.it: Enciclopedia, Vocabolario
; ; AGROVOCFAO <Food and Agriculture Organization of the United Nations> AGROVOC Multilingual thesaurus
; CABCommonwealth agricultural bureaux International, CAB Thesaurus
; ITISITIS Integrated Taxonomicon Information System [partners:] USDA, NOA, USGS, Smithsonian Institution... [et al.], 2016-.
; UniProtUniProt [Universal Protein Resource], by UniProt Consortium
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