Field Crops in South Africa, by H. D. Leppan and G. J. BosmanHubert Dudley Leppan, Gideon Johannes Bosman · First published 2018Open the Tome
The interdependence of animals, crops and pasture, with special reference to South African farmingHubert Dudley Leppan · First published 1936Open the Tome
The agricultural development of arid and semi-arid regionsHubert Dudley Leppan · First published 1928Open the Tome
