Our soils and their management :
Donahue, Roy Luther,
Our soils and their management : increasing production through environmental soil and water conservation / Roy Luther Donahue ; Roy H. Follett ; Rodney W. Tulloch - 5th ed. - Danville, Ill. : Interstate Printers & Publishers, 1983. - xv, 622 p. : ill. ; 27cm
Our soils and their management : increasing production through environmental soil and water conservation / Roy Luther Donahue ; Roy H. Follett ; Rodney W. Tulloch - 5th ed. - Danville, Ill. : Interstate Printers & Publishers, 1983. - xv, 622 p. : ill. ; 27cm