Notes on the Primates of Northwestern Kenya
Author(s): De Jong, Y.A. & Butynski, T.M.
Date: 2014
Registered: Unpublished report to the National Geographic Society
Vocal Profiles for the Galagos: A Tool for Identification
Author(s): Bearder, S.K., Butynski, T.M. & De Jong, Y.A.
Date: 2013
Registered: Primate Conservation 27: 75
Survey of the Patas Monkey in Laikipia.
Author(s): De Jong, Y.A., Butynski, T.M.
Date: 2011
Registered: Laikipia Wildlife Forum Newsletter, June 2011.
The Primates of East Africa: Country Lists and Conservation Priorities.
Author(s): De Jong, Y.A. & Butynski, T.M.
Date: 2012
Registered: African Primates 7 (2): 135-155.
Survey of the Primates of the Loita Hills, Kenya
Author(s): Butynski, T.M. & De Jong, Y.A.
Date: 2012
Registered: Unpublished report to Primate Conservation Inc., Rhode Island, USA.