Survey of the cost of production of cotton in the pongola extension area
Kassier, W.E., Graham, J.D.
Survey of the cost of production of cotton in the pongola extension area - Pretoria 1968 - 28 p. - No. 72; Africa South Departmen .
Survey of the cost of production of cotton in the pongola extension area - Pretoria 1968 - 28 p. - No. 72; Africa South Departmen .