De Kay, J. E.
1842. Zoology of New-York. Part III. Reptiles and Amphibia. Albany, vi + 98 pp., 23 pls.
Dellinger, S. C., and Black, J. D.
1938. Herpetology of Arkansas. Part One. The Reptiles Occas. Pap. Univ. Arkansas Mus., No. 1:1-47 pp., June 11.
Deraniyagala, P. E. P.
1930. Testudinate evolution. Proc. Zool. Soc. London, 1930, pp. 1057-70, 3 pls., January 21, 1931.
1939. The tetrapod reptiles of Ceylon. Volume 1. Testudinates and crocodilians. Ceylon Jour. Sci., Columbo Mus. Nat. Hist. Ser., xxxii + 412 pp., 137 figs., 24 pls., 62 tables.
De Rooij, N.
1915. The reptiles of the Indo-Australian Archipelago. I. Lacertilia, Chelonia, Emydosauria. E. J. Brill Ltd., Leiden, xiv + 384 pp., 132 figs.
De Sola, C. R., and Abrams, F.