Osterhoff, D.R.; Petrie, I.A.; Young, E. 1972. Haemoglobins in wild animals. Journal of the South African Veterinary Association 43 (4): 361-362, fig. 1.
Osterhoff, D.R.; Keep, M.E. 1970. Natural variation in the blood proteins of white and black rhinos. Lammergeyer 11: 50-57, figs. 1-3.






