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.
Adolf Ernst. Foto de Dr Adolf Ernst en la Gaceta Muskus Caracas No octubre php title Imagen AdolfoErnst Adolf Ernst PDVenezuela Adolf Ernst Scientists from Venezuela
Page 2023 Free-images.com. All images are Public Domain