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.
AUGUSTIN FRIEDRICH KEKULE. sq Kekule August Kekul September July was German organic chemist gobiernodecanarias org htm author other versions PDold Friedrich August Kekul
Page 2023 Free-images.com. All images are Public Domain