1. Awbrey, F. T., 1965, An experimental investigation of the effectiveness of anuran mating alls as isolating mechanisms, Ph.D. Thesis, University of Texas at Austin.
2. Bayless, L. E., 1966, Comparative ecology of two sympatric species of Acris (Anura: Hylidae) with emphasis on interspecific competition, Ph.D. Thesis, Tulane University, Louisiana.
3. Bayless, L. E., 1969, Ecological divergence and distribution of sympatric Acris populations (Anura; Hylidae), Herpetologica 25: 181–187.
4. Blair, W. F., 1955, Mating call and stage of speciation in the Microhyla olivacea—M. carolinensis complex, Evolution 9: 469–80.
5. Blair, W. F., 1958a, Mating call in the speciation of anuran amphibians, Am. Nat. 92: 27–51.