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.
Keywords from Image Description:
La Nature Mars en juin croquis de Flammarion p. Aspect de la plante Mars en juin D'aprs un croquis de Flammarion pour La Nature revue des sciences page cnam fr cgi KY author This image is in the public domain because its copyright has expired PDold La Nature Revue des Sciences Old maps of Mars Old astronomical prints