License, verbatimPD
The Rijksmuseum, Amsterdam: image designated Public Domain (Public Domain Mark 1.0) in the museum's own Linked Art record.
anonymous. Studieblad met scheermessen (Ensis arcuatus), ruwe boormossels (Zirfaea Crispata) en witte boormossel (Barnea Candida), 1575 - 1599. Rijksmuseum, Amsterdam.