| Ledger, J., 1990. Wildlife conservation in Namibia. International Wildlife Rancher 1 (4): 8-9, figs. 1-2
|
|
| Ledger, J., 1989. Black rhinos. Southern African Journal of Environmental Education 9: 28
|
|
| Ledger, J., 1988. Report of the Director for the year ended March 31, 1988. Quagga 23: 13-15
|
|
| Ledger, J., 1987. Black rhino population genetics for conservation management. Quagga 19: 18-22, figs. 1-4, table 1
|
|
|