@book{8944,
	author = {De La Roca García, Gustavo Adolfo},
	title = {Informe final programa de EPS, Ingenio Madre Tierra, Sta. Lucía Cotzumalguapa, Escuintla, Guatemala feb.-oct. 2006.},
	publisher = {USAC,},
	year = {2006},
	address = {Guatemala :}
}