Keywords: Pierre Joseph Pelletier.jpg en Pierre Joseph Pelletier a French chemist Litograph http //wellcomeimages org/indexplus/imageV0004582 html http //www larousse fr/encyclopedie/personnage/Pelletier/137466 Lithograph by N E Maurin < 1842 PD-old-100 Cc-by-4 0 Pierre Joseph Pelletier |