@book{95742,
	author = {Cortés Flores, Crispín.},
	title = {Manejo de la maleza en el cultivo de lechuga (Lactuca sativa L.) en Chapingo, México},
	publisher = {El autor,},
	year = {2008},
	address = {Chapingo, Méx. :},
	url = {http://10.13.5.2/tesis/107370.pdf}
}