Possibility of Crosses in a Tadpole Population between the Grass Frog (Rana temporaria L.) and the Marsh Frog (Rana arvalis Nilss.)

ZYSK, A.
Possibility of Crosses in a Tadpole Population between the Grass Frog (Rana temporaria L.) and the Marsh Frog (Rana arvalis Nilss.)
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270812-2407
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ZYSK, A.
Krakau 1970, Sep., 7 Seit., 3 Abb.
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Author ZYSK, A.