. . . "0475-2953" . "1951" . . "220" . . "PS, The Preventive Maintenance Monthly" . . . . . . . . . "The Preventive Maintenance Monthly" . . . . . . . "PS" . . "Premiere issue of PS (June 1951). Art by Will Eisner." . . "PS, The Preventive Maintenance Monthly" . . . . "P.S." . . .