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♦ ¹PARROT CLAYLICKS: DISTRIBUTION, PATTERNS OF USE AND ECOLOGICAL CORRELATES FROM A PARROT ASSEMBLAGE IN SOUTHEASTERN PERU, ALAN TRISTRAM KENNETH LEE, dissertation for DOCTOR OF PHILOSOPHY, Manchester Metropolitan University, November 2010
♦ ²Feeding Ecology of the Black Howler Monkey (Alouatta pigra) in Northern Belize, S.C. SILVER, L.E.T. OSTRO, C.P. YEAGER, AND R. HORWICH, American Journal of Primatology 45:263–279 (1998)