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	Base de datos	Solicitud de búsqueda	No. de registros
	IFOP	W-subjects= crustaceos	407
	IFOP	W-subjects= bentonicos	22
	IFOP	W-subjects= demersales	530
	IFOP	W-subjects= demersales	530
	IFOP	W-subjects= bentonicos	22
	IFOP	W-subjects= bentonicos	22
	IFOP	W-subjects= pelagicos	11
	IFOP	W-subjects= crustaceos	407
	IFOP	W-subjects= pelagicos	11
	IFOP	W-subjects= ( crustaceos ) and W-language code= heb	0
	IFOP	W-subjects= bentonicos	22
	IFOP	W-subjects= crustaceos	407
	IFOP	W-subjects= ( bentonicos ) and W-language code= heb	0
	USMARC Course(USM30)	W-Subjects= pelagicos	0
	IFOP	W-subjects= crustaceos	407
	IFOP	W-subjects= demersales	530
	IFOP	W-subjects= demersales	530
	IFOP	W-subjects= pelagicos	11
	East Asian Library	W-Materia= pelagicos	0
	IFOP	W-subjects= demersales	530
	Ex Libris University	W-Materia= pelagicos	0
	IFOP	W-subjects= demersales	530
	IFOP	W-year= 1980->2000 and W-subjects= ( bentonicos )	8
	Library of Congress	WRD= ( WSU= demersales )	0
	IFOP	W-subjects= bentonicos	22
	IFOP	W-subjects= ( bentonicos ) and W-language code= heb	0
	Ex Libris University	W-Materia= pelagicos	0