The frog genus Atelopus in Ecuador (Anura: Bufonidae)Smithsonian Institution Press; for sale by the Supt. of Docs., U.S. Govt. Print. Off.49
Peters, James Arthur. 1973. The frog genus Atelopus in Ecuador (Anura: Bufonidae). Washington: Smithsonian Institution Press; for sale by the Supt. of Docs., U.S. Govt. Print. Off.. In Smithsonian Contributions to Zoology, 145.