@book{661,
	author = {Burrows, William. and Freeman, Bob A.},
	title = {Microbiología de Burrows},
	publisher = {Interamericana,},
	year = {1989},
	address = {México, D. F. :},
	note = {Trad. de: Textbook of microbiology, 22 ed. de 1985}
}