Bartsch P., - Notes on the freshwater mollusk Planorbis magnificus and descriptions of two new forms of the same genus from the Southern States1907. In 8vo, offp., pp. pp. 4 + 1 pl. Offprint from Proc. US. Natnl. Mus., 33 n. 1587 EUR 3.00 [Appr.: US$ 3.39 | £UK 2.75 | JP¥ 493] Book number 8715is offered by:
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