Abstract
References
1.
Ellerman, J.R.
: The Families and Genera of Living Rodents, Vol. II , London , England, 1941 , the British Museum, Jarrold and Son , pp. 444 -445 .
2.
Ockerse, T.
: Dental Caries: Clinical and Experimental Investigation, Pretoria , 1949 , Department of Health .