Hartley, Carr 1951. Letter of 20 February 1951 to Henry Ringling North offering the pair of northern white rhinos to the circus. Manuscript in Circus World Museum, Baraboo (contributed by Richard J. Reynolds).
Letter of 20 February 1951 to Henry Ringling North offering the pair of northern white rhinos to the circus
Srivastav, A.; Nigam, P.; Sangmo Lama, N. 2016. National Studbook of One Horned Rhinoceros (Rhinoceros unicornis). Wildlife Institute of India, Dehradun and Central Zoo Authority, New Delhi. 1-65.
PDF download available
Weigl, R. 2015. Longevity of mammals in captivity: from the living collections of the world. Stuttgart, E. Schweizerbart (Kleine Senckenberg-Reihe 48).
Rookmaaker, L.C. 1998. Chapter 9. References (on rhinoceros in captivity). In: Rookmaaker, L.C., The rhinoceros in captivity: a list of 2439 rhinoceroses kept from Roman times to 1994. The Hague. pp. 375-389.
PDF download available
Rookmaaker, L.C. 1998. Chapter 3. Early rhinoceroses in Rome, China and the Near-East. In: Rookmaaker, L.C., The rhinoceros in captivity: a list of 2439 rhinoceroses kept from Roman times to 1994. The Hague. pp. 27-32.
PDF download available
Rookmaaker, L.C. 1998. Chapter 2. Statistics on demography and reproduction. In: Rookmaaker, L.C., The rhinoceros in captivity: a list of 2439 rhinoceroses kept from Roman times to 1994. The Hague. pp. 21-25.
PDF download available
Rookmaaker, L.C. 1998. Chapter 1. Introduction. In: Rookmaaker, L.C., The rhinoceros in captivity: a list of 2439 rhinoceroses kept from Roman times to 1994. The Hague. pp. 1-19.
PDF download available
Kawata, K. 2025. This, that and the other things in zoo history. Journal of the Bartlett Society 33: 57-70.
PDF download available
Damen, M.; Kreuger, M. 1996. Indische neushoorns in Europa. Vriendennieuws (Blijdorp, Rotterdam) 18 (4): 21-24.