Wall, F. Snakes of Ceylon - Navrag N.D. 1993 - 581 - Reptiles Siltbura Typhlopidae Boidae ISBN: 81-7013-108-1 Nat. Bib. No.: 5659 Nat. Bib. Agency Control No.: 598.12(548598.12(548.7)WAL S.L. Subjects--Topical Terms: Biological Sciences Universal Decimal Class. No.: 598.12(548.7) 1