Heerden, J. van

Horak, I.G.; Jordaan, A.J.; Nel, P.J.; Heerden, J. van; Heyne, H.; Dalen, E.M. van 2015. Distribution of endemic and introduced tick species in Free State Province, South Africa. Journal of the South African Veterinary Association 86 (1) - Art. 1255: 1-9.

Heerden, J. van; Keffen, R.H.; Kuhn, F.; Rogers, P.S.; Morkel, P.; Atalia, N.; Raath, J.P.; Kernes, D.J. 1994. Clinical pathology parameters in white, black and northern white rhinos. pp. 189-195, tables 1-4.

Heerden, J. van; Keffen, R.H.; Dauth, J.; Dreyer, M.J. 1985. Blood chemical parameters in free-living white rhinoceros Ceratotherium simum. Journal of the South African Veterinary Association 56: 187-189, figs. 1-2, tables 1-3.