This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Ernst August Lehmann. Photo of Ernst Lehmann Catalog BIOL Lehmann Ernst SDASM Archives User upload bot October UTC Blond Thinker PDSDASM Ernst August Lehmann
Page 2023 Free-images.com. All images are Public Domain