Species richness and abundance of amphibians in older secondary vs. old growth stands in the research natural area, Allegheny National Forest, McKean County, Pennsylvania, 190 - 01 - 04 - LD1017 .C8133 1998 M33, Volume: Archives LD1017 .C8133 1998 M33; Volume: Carlson Library Level A Main Quarto Collection QL719.P4 M3 1998. Clarion University Archives.

Species richness and abundance of amphibians in older secondary vs. old growth stands in the research natural area, Allegheny National Forest, McKean County, Pennsylvania, 190 - 01 - 04 - LD1017 .C8133 1998 M33, Volume: Archives LD1017 .C8133 1998 M33; Volume: Carlson Library Level A Main Quarto Collection QL719.P4 M3 1998. Clarion University Archives. http://as-clarion.klnpa.org/repositories/2/resources/434 Accessed December 23, 2025.