Avise, J.C. and M.H. Smith. 1977. Gene frequency comparisons between sunfish (Centrarchidae) pop-ulations at various stages of evolutionary divergence. Syst. Zool., 26: 319-335.
Avise, J.C., J.J. Smith and F.J. Ayala. 1975. Adap-tive differentiation with little genic change between two native California minnows. Evolution, 29: 411-426.
Buth, D.G. and B.M. Burr. 1978. Isozyme vari-ability in the cyprinid genus Campostoma. Copeia, 1978 (2): 298-311.
Echelle, A.A. and A.F. Echelle. 1984. Evolutionary genetics of a “species flock”: Atherinid fishes from the Mesa Central of Mexico. Pages 93-110 in A. A.
Echelle and I. Kornfield, eds. Evolution of fish species flocks. Univ. of Maine Press, Orono.