Williams, J. D, M. L. Warren, K. S. Cummings, J. L. Harris, and R. J. Neves (1993). "Conservation Status of Freshwater Mussels of the United States and Canada". Fisheries. 18 (9): 6–22. doi:10.1577/1548-8446(1993)018<0006:CSOFMO>2.0.CO;2. ISSN1548-8446.CS1 maint: multiple names: authors list (link)
Williams, J. D, M. L. Warren, K. S. Cummings, J. L. Harris, and R. J. Neves (1993). "Conservation Status of Freshwater Mussels of the United States and Canada". Fisheries. 18 (9): 6–22. doi:10.1577/1548-8446(1993)018<0006:CSOFMO>2.0.CO;2. ISSN1548-8446.CS1 maint: multiple names: authors list (link)