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Pfingsten, Ralph A.
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1

Distribution of Ohio Amphibians:

, In: Status and Conservation of Midwestern Amphibians,
Pfingsten, Ralph A. - p. 221-256 , 1998
Link: https://doi.org/10.2307/..
 
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2

Salamanders of Ohio 

Bulletin of the Ohio Biological Survey ; n.s., vol. 7, nr. 2
Pfingsten, Ralph A. ; Downs, Floyd L. , 1989
Copies:  Zentrale:Magazin Zs fc 2297-7
 
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Some Nearly All Black Populations of Plethodon cinereus (Am..:

Pfingsten, Ralph A. ; Walker, Charles F.
Journal of Herpetology.  12 (1978)  2 - p. 163-167 , 1978
Link: https://www.jstor.org/st..
 
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4

An Erythristic Population of Plethodon cinereus in Ohio:

Pfingsten, Ralph A.
Journal of Herpetology.  3 (1969)  1/2 - p. 104-105 , 1969
Link: https://www.jstor.org/st..
 
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