14 books • 3 series
Our Little Swedish Cousin
Our Little Spanish Cousin
Amphibians And Reptiles Of The Rainforests Of Southern El Peten, Guatemala
The Amphibians And Reptiles Of Michoacán, México
The Hylid Frogs of Middle America; Volume 1
The Hylid Frogs of Middle America, Vol. 1 (Classic Reprint)
Descriptions of New Hylid Frogs from Mexico and Central America
Herbarz Polski (1 )
Biographie Universelle, Ancienne Et Moderne; Supplement, Ou Suite de L'Histoire, Par Ordre Alphabetique, de La Vie Publique Et Privee de Tous Les Homm
The South American Herpetofauna
The Hylid Frogs of Middle America
Guide to the Frogs of the Equitos Region, Amazonian Peru (Special Publication / The University of Kansas, Natural Hist, #22)
Amphibian Species of the World (Special Publication / The University of Kansas Museum of Nat, #21)
Liste Der Rezenten Amphibien Und Reptilien. Hylidae, Centrolenidae, Pseudidae (Veroffentlichungen Zur Brandenburgischen Kulturgeschichte de, #95)