@book{214215,
	author = {Hafliger, Ernst and Brun Hool, Josef},
	title = {Tablas CIBA-GEIGY de malas hierbas. Presentación sinóptica de la flora de malas hierbas de los cultivos agrícolas : Polygonaceae / E. Hafliger...[et al]},
	publisher = {Ciba-Geigy},
	year = {1969},
	address = {Switzerland}
}