"Amphibians of Western North America" - Slavin. (Occ. Papers - Calif. Academy of Sciences XVI, 1928

"Reptiles and Amphibians" - Barbour.

"Handbooks of Reptiles and Amphibians of the Pacific States" - Slavin. (Calif. Academy of Sciences, 1933)

"A Check List of North American Reptiles and Amphibians" - Stejneger and Barbour. (Harvard Univ. Press, 1933)

"Our Friend the Frog" - Cochran. (National Geographic Magazine. Vol. LXI, No. 5; May, 1932.)

"Frogs, Toads and Salamanders" - Western Nature Study, Dept. of Natural Science, San Jose State College, San Jose, Calif.; Vol. 1, No. 1; February, 1930.