1. Butterlin , J. 1956 La constitution geologique et la structure des Antilles: Centre National de la Recherche Scientifique 1 453
2. Pleistocene ice volumes and sea-level lowering;Donn;J. Geol.,1962
3. Notes on American mabuyas;Dunn;Proc. Acad. Natur. Sci. Philadelphia,1936
4. Postglacial uplift in North America;Farrand;Amer. J. Sci.,1962
5. Gans , C. 1964 Amphisbaena schmidti , a third species of the genus from Puerto Rico (Amphisbaenia: Reptilia) Breviora Mus. Comp. Zool. Harvard 198 1 11