LITERATURE CITED
- Hall , Sir A. D. 1920 . —The Soil, third edition
- Harvey , W. H. 1869 . —Memoirs of Dr. Harvey
- Marloth , R. 1908 . —Das Kapland, Jena
- Palladin , W. 1918 . —Plant Physiology, edited by B. E. Livingston
- Phillips , E. P. 1920 . “A Preliminary Report on the Veld-burning Experiments at Groenkloof, Pretoria,” . South African Journal of Science , xvi
- Phillips , E. P. “ —“Veld-burning Experiments at Groenkloof,” . Union of South Africa, Department of Agriculture, Science Bulletin, No. 17.