Moehlman, P.D.; Amato, G.D.; Runyoro, V. 1996. Genetic and demographic threats to the black rhinoceros population in the Ngorongoro Crater. Conservation Biology 10 (4): 1107-1114, figs. 1-3, tables 1-2.
Moehlman, P.D. 1985. The odd-toed ungulates: order Perissodactyla.






