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A revision of the American clupeid fishes of the genus Harengula, with descriptions of four new subspecies.
Author: Rivas, Luis Rene
Call no: RP2721
Year: 1950
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Definitions and methods of measuring and counting in the billfishes (Istiophoridae, Xiphiidae)
Author: Rivas, Luis Rene
Call no: RP9883
Year: 1956
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Cichlasoma pasionis, a new species of cichlid fish of the Thorichtys group, from the Rio de la Pasion, Guatemala
Author: Rivas, Luis Rene
Call no: RP13699
Year: 1962
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A reinterpretation of the concepts "Sympatric" and "Allopatric" with proposal of the additional terms "Syntopic" and "Allotopic"
Author: Rivas, Luis Rene
Call no: RP15427
Year: 1964
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