Bibliography
Brown, L. E., H. M. Smith, and R. S. Funk . 1977. Request for the conservation of Rana sphenocephala Cope 1886, and the suppression of Rana utricularia Harlan, 1826 and Rana virescens Cope, 1889 (Amphibia: Salientia). Bulletin of Zoological Nomenclature 33: 195-203.
