Podgaiski, L.R. and Jardim, M.M.A. 2009. Early behavioral development of a free-ranging howler monkey infant (Alouatta guariba clamitans) in southern Brazil. Neotropical Primates. 16, 1 (Jun. 2009), 27–31. DOI:https://doi.org/10.1896/044.016.0106.