@book{8270,
	author = {Alvarez Negrete, Yesenia.},
	title = {Estudio epidemiológico de la roya amarilla de la cebada Puccinia striiformis f. sp. hordei. ; en Texcoco, Méx.},
	publisher = {El Autor,},
	year = {1993},
	address = {Chapingo, Méx. :}
}