Unit costs on maize farms in the North-Western, O.F.S.
van Wyk, S.P.
Unit costs on maize farms in the North-Western, O.F.S. - Pretoria 1957 - 22 p. - No. 347; Union of South Afric .
Unit costs on maize farms in the North-Western, O.F.S. - Pretoria 1957 - 22 p. - No. 347; Union of South Afric .