2013ANSI N43.5-2013 Radiological Safety Standard for the Design of Radiographic and Radioscopic Non-Medical X-Ray Equipment Below 1 MeV
1977ANSI N43.5-1977 American National Standard N537: Radiological Safety Standard for the Design of Radiographic and Fluoroscopic Industrial X-Ray Equipment Now Copyrighted by HPS * NBS Handbook 123