@book{220316,
	author = {Romero Castillo, Pilar América and Leyva Ruelas, Gabriel},
	title = {Incidencia de salmonella y E. Coli en queso crema tropical : },
	publisher = {El autor,},
	year = {2007},
	address = {Chapingo, México :},
	url = {http://10.13.5.2/tesis/tm/ROMERO_CASTILLO_PILAR.pdf}
}