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| 1. |
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Amphibians and Reptiles of New York State
James P Gibbs, Alvin R Breisch, Peter K Ducey, Glenn Johnson, The Late John Behler
E-bok. Oxford University Press, Storbritannien, 2007.
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 |
| 2. |
|
Amphibians and Reptiles of New York State
James P Gibbs, Alvin R Breisch, Peter K Ducey, Glenn Johnson, The Late John Behler
E-bok. Oxford University Press, Storbritannien, 2007.
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