Gipson, Roger D. 1991 Corn performance tests / Roger D. Gipson, Paul L. Raymer, an d J. LaDon Day - [s.l.]: [s.n.], 1991 - 37 p. : ill.; 28 cm. - Research report; no.606 . Subjects--Topical Terms: Corn. Dewey Class. No.: PF 641.3315 GIP