Graphic representation of the periodic table of chemical elements designed as a left-step table with Group 0 positioned on the right-hand side of the table. This table was originated by Henry Bassett in 1892 and classified by chemist Edward G. Mazurs as Type IIIC3-1 in his seminal work Types of Graphic Representation of the Periodic System of Chemical Elements (1957). This table appears as Figure 68 on page 135 of Mazurs' 1957 publication.
Mazurs, Edward G., and Henry Bassett. “Left-Step Table with Group 0 on Right-Hand Side.” Glass, circa 1892–1957. Edward G. Mazurs Collection of Periodic Systems Images, Box 1. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/02870w51s.