@book{87435,
	author = {López Ramírez, René.},
	title = {Control químico de la maleza en el cultivo de la calabacita (cucurbita pepo L.) var. Gray Zucchini en Chapingo, México},
	publisher = {El autor,},
	year = {2003.},
	address = {Chapingo, Méx. :},
	url = {http://10.13.5.2/tesis/98952.pdf}
}