@book{1027,
	author = {Ladrach, William E. and SMURFIT CARTON DE COLOMBIA. DIVISION FORESTAL},
	title = {Preguntas y respuestas ecología forestal},
	publisher = {Smurfit Cartón de Colombia},
	year = {1989},
	address = {Bogotá},
	edition = {3a ed}
}