Clarke, R. F. (1958). An ecological study of reptiles and amphibians in Osage County, Kansas. Graduate Division of the Kansas State Teachers College.
Lua i Stíl Chicago (17ú heag.)Clarke, Robert F. An Ecological Study of Reptiles and Amphibians in Osage County, Kansas. Emporia: Graduate Division of the Kansas State Teachers College, 1958.
Lua MLA (8ú heag.)Clarke, Robert F. An Ecological Study of Reptiles and Amphibians in Osage County, Kansas. Graduate Division of the Kansas State Teachers College, 1958.
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