Sofia, Pensoft, 1996-2001. In six volumes. 8vo (24.0 x 16.6 cm). 233 pp.; numerous coloured and plain photographs. Original near-uniform full-colour pictorial softcovers.

First six volumes of an important English-language periodical on studies on amphibians from Russia, including Siberia, and the other states once forming the Soviet Union. With numerous papers, several of high taxonomic importance. Included are The amphibians of the Caucasus (= the complete Volume 4) and Mountain salamanders of the genus Ranodon (= the complete Volume 6). An unmarked, near mint set.