Strien, N.J. van 1976.The Gunung Leuser Reserve.Tiger Paper 3 (4): 5-8, figs. 1-2, map 1.
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Strien, N.J. van 1976.Fourth, fifth and sixth Mamas expedition, January – July 1976.Progress Report, no. 4.pp. 1-6.
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Strien, N.J. van 1975.Rhino traps in the Gunung Leuser Reserve.Report no. 1.pp. 1-4.
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Strien, N.J. van 1975.Dicerorhinus sumatrensis (Fischer), the Sumatran or two-horned rhinoceros: a study of literature.Mededelingen van de Nederlandse Commissie voor Internationale Natuurbescherming 22: 1-82.
Strien, N.J. van 1974.Dicerorhinus sumatrensis (Fischer), the Sumatran or two-horned rhinoceros: a study of literature.Mededelingen Landbouwhogeschool Wageningen 74 (16): 1-82, pl. 1, figs. 1-2, maps 1-2.