Image: Ernst Haeckel Signature
Ernst_Haeckel_Signature.jpg (478 × 126 pixels, file size: 15 KB, MIME type: image/jpeg)
Description: Ernst Haeckel signature
Title: Ernst Haeckel Signature
Credit: https://archive.org/details/cassellsuniversa00londiala/page/47/mode/1up?view=theater
Author: Ernst Haeckel
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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