@book{98332,
	author = {Ortega Naredo, Valeriano and Roblero Hidalgo, Rodrigo},
	title = {Estudio hidrogeológico en la zona Mata Obscura, municipio de Totutla, Veracruz},
	publisher = {El autor,},
	year = {2009},
	address = {Chapingo, Méx. :}
}