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Yonushonis, W. P., M. R. Elwell, P. G. Lawyer and E. C. Rabago.  1986.  Infection of a three-toed sloth (Bradypus variegatus) by a Pneumocystis-like organism in Panama.  Journal of Wildlife Diseases, 22(4): 572-775.

Yoshiro T., F. U. Calderón, and R. Quesada.  1990.  Ultrastructural study of crystalloids in Sertoli cells of the three-toed sloth (Bradypus tridactylus).  Cell and Tissue Research, 259: 599-602.

Young, O. P.  1981.  The utilization of sloth dung in a Neotropical forest.  The Coleopterists Bulletin, 35(4): 427-430.


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