Bibliography
Nielson, M., K. Lohman, C. H. Daugherty, F. W. Allendorf, K. L. Knudsen, and J. Sullivan . 2006. Allozyme and mitochondrial DNA variation in the tailed frog (Anura: Ascaphus): the influence of geography and gene flow. Herpetologica 62: 235-258.
