References (voce: Ascaridi); AGROVOCFAO <Food and Agriculture Organization of the United Nations> AGROVOC Multilingual thesaurus
; ; ; ; NALTUSDA <United States department of agriculture> - National agricultural library - Inter-American institute for cooperation on agriculture, National Agricultural Library Thesaurus Concept Space
; TaxThe Taxonomicon & Sistema Naturae 2000, editor S.J. Brands
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