Descriptions of Two Species of Frogs, Genus Ptychohyla Studies of American Hylid Frogs, V

William Edward Duellman

《Descriptions of Two Species of Frogs, Genus Ptychohyla Studies of American Hylid Frogs, V》，William Edward Duellman。这是一部关于自然、科学、文学的公版作品，适合在安静的片刻里慢慢读下去。