Tractors in agriculture

Orlovsky, Peter A.Tractors in agriculture: comp.Description of tractors and calculations of the cost of fur.field processing.- Leningrad: Scientific Book of Identes, [1926].-70, [2] p.: il., table .. - (peasant construction).-On the region.plug.Series: Peasant farm..1. The people (collection).Electronic copy source: PBOriginal storage: St. Petersburg State University