Bibliography
de Sá, R. O., and D. M. Hillis . 1990. Phylogenetic relationships of the pipid frogs Xenopus and Silurana: an integration of ribosomal DNA and morphology. Molecular Biology and Evolution 7: 365-376.
de Sá, R. O., and D. M. Hillis . 1990. Phylogenetic relationships of the pipid frogs Xenopus and Silurana: an integration of ribosomal DNA and morphology. Molecular Biology and Evolution 7: 365-376.
