Hanson, Angus Alexander. Practical handbook of agricultural science - Boca Raton, Fla. : CRC Press, 1990 - 534 p. 63-75 LCCN: 7358 Subjects--Topical Terms: Agricultura--E.U.A.Agricultura--E.U.A.Agricultura--Manuales. Dewey Class. No.: 630 / H3