@book{31467,
	author = {Martínez Barrera, Ramón.},
	title = {Efecto de las radiaciones Gamma de Co-60 en Agrobacterium tunefaciens (E.F. Sm. y Towns) Cunn},
	publisher = {El autor,},
	year = {1968},
	address = {Chapingo, Méx. :}
}