| Sadjudin, H.R., 1984. Census badak jawa (Rhinoceros sondaicus Desmarest, 1822) di Ujung Kulon, April 1984. Report to WWF, pp. 1-24
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| Sadjudin, H.R., 1980. Badak Sumatera (Dicerorhinus sumatrensis Fischer, 1814). Thesis presented to the Universitas Nasional, Jakarta, pp. 1-60
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