Isnan, W.; Subrata, D.R.; Strien, N.J. van 2006. Indonesian rhino conservation program: Annual report 2005. Bogor, IRCP-PKBI. pp. 1-45.
Isnan, W.; Subrata, D.R.; Strien, N.J. van 2006. Indonesian rhino conservation program: Annual report 2006. Bogor, IRCP-PKBI. pp. 1-59.
Hutabarat, A.A.; Subrata, D.R.; Strien, N.J. van 2002. Indonesian rhino conservation program: Annual report 2001. Bogor, IRCP-PKBI. pp. 1-50.
Hutabarat, A.A.; Subrata, D.R.; Strien, N.J. van 2001. Indonesian rhino conservation program: Annual report and summary of relevant data 2000. Bogor, IRCP-PKBI. pp. 1-37.
Hutabarat, A.A.; Subrata, D.R.; Strien, N.J. van 2000. Indonesian rhino conservation program: quarterly activity and performance reports, summary of relevant data 1999. Report. pp. 1-45.






