 | Brett, R.A., 1989. Carrying capacities of rhino sanctuaries and future breeding of black rhino in Kenya. Unpublished report, Kenya Rhino Rescue Project: pp. 1-19
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 | Brett, R.A., 1988. Report on the suitability of the Ol Pejeta Rhino Sanctuary as black rhino habitat with some observations on holding capacity. Unpublished report, Kenya Rhino Rescue Project: pp. 1-6
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