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- Bussing, William. 1976. "Geographic Distribution of the San Juan Ichthyofauna of Central America with Remarks on its Origin and Ecology". INVESTIGATIONS OF THE ICHTHYOFAUNA OF NICARAGUAN LAKES, ed. Thomas B. Thorson, University of Nebraska-Lincoln. pp. 157-175 (crc04837) (abstract).
- Bussing, William & M. Martin. 1975. "Systematic status, variation and distribution of four Middle American cichlid fishes belonging to the Amphilophus species group, genus Cichlasoma". Natural History Museum L.A. County Contributions of Science. n. 269; pp. 1-41 (crc01108).
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