 | Oloo, T.W.; Brett, R.; Young, T.P., 1994. Seasonal variation in the feeding ecology of black rhinoceros (Diceros bicornis L.) in Laikipia, Kenya. African Journal of Ecology 32: 142-157, figs. 1-2, tabs. 1-3
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 | Young, T.P.; Evans, M.R., 1993. Alpine vertebrates of Mount Kenya, with particular notes on the rock hyrax. Journal of the East African Natural History Society 82 (202): 55-79, table 1
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