An economic inquiry into wheat farming in the Western Cape Province 1929-1930

An economic Study of the wheat industry in the Union (More particulary the Western Cape Province)

Pretorius, W. J., (1935)

An economic investigation into the tobacco industry of the Western Transvaal 1927-1928

Pretorius, W. J., (1930)

The Cost of manufacture, etc. of butter and cheese : 2nd report

Adams, J. J., (1934)