Graphic representation of the periodic table of chemical elements in the style of concentric circles on a plane. This table was originated by L. Sibaiya in 1941 and classified by chemist Edward G. Mazurs as Type IIIB4-3 in his seminal work Types of Graphic Representation of the Periodic System of Chemical Elements (1957). This illustration appears as Figure 94 on page 157 of Mazurs' 1957 publication.
Mazurs, Edward G., and L. Sibaiya. “Periodic Table in Style of Concentric Circles on a Plane.” Glass, circa 1941–1957. Edward G. Mazurs Collection of Periodic Systems Images, Box 2. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/02870w54m.