Britton, Joseph; Britton, Michael; Britton, David & La Grove, M. Toxolasma texasense, Specimen #1192, specimen, August 25, 1979; (https://digital.library.unt.edu/ark:/67531/metadc35382/m1/1/: accessed November 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .