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.
Marie CurieTheses . en Marie Curie Recherches sur les substances radioactives de Marie Curie Recherches sur les substances radioactives med yale edu html Marie Curie PDold Marie Curie documents Doctoral theses
Page 2023 Free-images.com. All images are Public Domain