TY  - BOOK
AU  - Martens, H. E.
AU  - ill.
TI  - The effect of tribal grazing patterns on the habitat in the Kalahari : conference on sustained production from semi-arid areas with particular reference to Botswana
AV  - EAF M33.E3 
CY  - Gaborone
KW  - Tribal grazing
ER  -