Tuff, Donald W.Carrola, Harry Lee2024-05-072024-05-071978-08Carrola, H.L. (1978). A comparative study of two populations of Psephenus texanus: (Coleoptera, Psephenidae) in the San Marcos and Comal Rivers (Unpublished thesis). Southwest Texas State University, San Marcos, Texas.https://hdl.handle.net/10877/18545No abstract prepared.Text57 pages1 file (.pdf)enwater beetlesinsectsSan Marcos RiverComal RiverThesis