@book{6678,
	author = {Aguilar Becerril, Guillermo.},
	title = {Comportamiento biológico del nopal (Opuntia spp.) al anillado.},
	publisher = {UACH. Departamento de Fitotecnia,},
	year = {1992.},
	address = {Chapingo, Méx. :}
}