@book{31394,
	author = {Burbano Orjuela, Hernán, and Silva Mojica, Francisco,},
	title = {Boletín de Suelos /},
	publisher = {Sociedad Colombiana de la Ciencia del Suelo,},
	year = {2010.},
	series = {Boletín No.54},
	address = {Bogotá :}
}