Kipps, M. S. Production of field crops ; a textbook of agronomy - 6 ed. - New York : McGraw-Hill, 1970 - 790 p. : ilus. ; mapas - McGraw-Hill publications in the agricultural sciences . - McGraw-Hill publications in the agricultural sciences . LCCN: 27840 Subjects--Topical Terms: Cultivos.Cultivos--Rendimiento. Dewey Class. No.: 631.5 / K5 1970