@book{2169,
	author = {Olvera Aránzolo, Humberto.},
	title = {Control químico del tizón temprano Alternaria solani Jones Grout en jitomate Lycopersicum esculentum en Ocuituco, Mor.},
	publisher = {El Autor,},
	year = {1991},
	address = {Chapingo, Méx. :}
}