Ecology and morphological variation of the Massasauga rattlesnake, Sistrurus catenatus, 190 - 01 - 04 - LD1017 .C8133 1978 R4, Volume: Archives LD1017 .C8133 1978 R4; Volume: Carlson Library Level A Main Quarto Collection QL666.O6 R4. Clarion University Archives.
Ecology and morphological variation of the Massasauga rattlesnake, Sistrurus catenatus, 190 - 01 - 04 - LD1017 .C8133 1978 R4, Volume: Archives LD1017 .C8133 1978 R4; Volume: Carlson Library Level A Main Quarto Collection QL666.O6 R4. Clarion University Archives. http://as-clarion.klnpa.org/repositories/2/resources/351 Accessed December 24, 2025.
