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	Base de datos	Solicitud de búsqueda	No. de registros
	IFOP	W-subjects= demersales	530
	IFOP	W-subjects= bentonicos	23
	USMARC AUT (USM10)	W-subj.= bentonicos	0
	IFOP	W-subjects= bentonicos	23
	IFOP	W-year= 1980->2000 and W-subjects= ( crustaceos )	113
	IFOP	W-subjects= crustaceos	408
	IFOP	W-subjects= pelagicos	11
	IFOP	W-subjects= pelagicos + Words= Disponible	6
	IFOP	W-subjects= pelagicos	11
	IFOP	W-subjects= bentonicos	23
	IFOP	W-subjects= pelagicos	11
	IFOP	W-subjects= demersales	530
	IFOP	W-Materia= demersales + Palabras= Disponible	376
	IFOP	W-subjects= demersales	530
	IFOP	W-subjects= ( demersales ) and W-language code= heb	0
	IFOP	W-subjects= crustaceos	408
	IFOP	W-subjects= bentonicos	23
	IFOP	W-subjects= ( crustaceos ) and W-language code= heb	0
	IFOP	W-subjects= bentonicos	23
	IFOP	W-subjects= pelagicos	11
	USMARC Course(USM30)	W-Subjects= demersales	0
	USMARC Course(USM30)	W-Subjects= bentonicos	0
	Library of Congress	WRD= ( WSU= crustaceos )	1
	IFOP	W-subjects= bentonicos	23
	IFOP	W-subjects= ( demersales ) and W-language code= heb	0
	IFOP	W-subjects= crustaceos	408
	IFOP	Words= ab? and W-subjects= ( pelagicos )	4
	IFOP	W-subjects= bentonicos	23