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.
Max von Pettenkofer. en Max Joseph Pettenkofer ennobled in as Max Joseph von Pettenkofer December February nlm nih gov author The National Library of Medicine believes this item to be in the public domain PDold Max von Pettenkofer
Page 2023 Free-images.com. All images are Public Domain