Limnological and ecological comparison of Bigger and Longs Run, Beaver and Washington Counties, Penna., 190 - 01 - 04 - LD1017 .C8133 1972 .S45, Volume: Archives LD1017 .C8133 1972 S45; Volume: Carlson Library Level A Main Quarto Collection QH541.5.F7 S45. Clarion University Archives.

Limnological and ecological comparison of Bigger and Longs Run, Beaver and Washington Counties, Penna., 190 - 01 - 04 - LD1017 .C8133 1972 .S45, Volume: Archives LD1017 .C8133 1972 S45; Volume: Carlson Library Level A Main Quarto Collection QH541.5.F7 S45. Clarion University Archives. http://as-clarion.klnpa.org/repositories/2/resources/305 Accessed December 22, 2025.