5. Februar 2021 #1 Snakes of the World: A Catalogue of Living and Extinct Species | Van Wallach, Kenneth L. Williams, Jeff Boundy | download (b-ok.cc)
16. Mai 2021 #2 Snakes of the world: a supplement Snakes of the world: a supplement | Boundy, Jeff; Wallach, Van | download (b-ok.cc)
