Precision field leveling
Gibson, Alonzo N.
Precision field leveling A simple method to irrigate and drain agricultural lands of moderate slope and plain topology by Alonzo N. Gibson and Francis N. Bligh - U.S.A. Eversman Mfg. Co. n.d. - 18 p.
Field leveling
631.67 / G449P
Precision field leveling A simple method to irrigate and drain agricultural lands of moderate slope and plain topology by Alonzo N. Gibson and Francis N. Bligh - U.S.A. Eversman Mfg. Co. n.d. - 18 p.
Field leveling
631.67 / G449P