Correspondenz-blatt des Zoologisch-mineralogischen Vereins in Regensburg (1847). Scan of 2 d images in the public domain believed to be free to use without restriction in the US.
Correspondenz-blatt des Zoologisch-mineralogischen Vereins in Regensburg (1847). Scan of 2 d images in the public domain believed to be free to use without restriction in the US.