@book{57191,
	author = {Symposium on Mutation and Plant Breeding. ( and National Academy of Sciences. Washington, D. C. Committee of Plant Breeding and Genetics of the Agricultural Board.},
	title = {Ponencias},
	publisher = {National Academy of Sciences,},
	year = {1960},
	series = {N.A.S., Pub. 891},
	address = {Washington :}
}