Crop production /
Hughes, Harold D.
Crop production / Harold D. Hughes and Darrel S. Mertcalfe. - 3rd ed. - New York : Macmillan, 1972. - 627p. : ills, ; 28 cm.
Crop production
Agronomy
631 / HUC 1972
Crop production / Harold D. Hughes and Darrel S. Mertcalfe. - 3rd ed. - New York : Macmillan, 1972. - 627p. : ills, ; 28 cm.
Crop production
Agronomy
631 / HUC 1972