Keywords: Niilo-J-Toivonen-1924.jpg en Photograph of the Finnish chemist Niilo J Toivonen 1888 “1961 http //www finna fi/Cover/Show id musketti M012 3AHK19651109 3A190 fullres 1 index 0 w 1200 h 1200 Anonymous 1924 PD-old-90 1888 births 1961 deaths Chemists from Finland Professors of University of Helsinki |