1. Phototherapy. Radiometric measurements on carbon arc and other light sources used in phototherapy; by W. W. Coblentz, M. J. Dorcas, [and] C. W. Hughes. Bookmark Corporate/Agency Authors: Standards Bureau and Commerce Department Publisher: Standards Bureau Date: Nov. 19, 1926, [reprint with slight changes] 1931 SuDoc number: C 13.3/a:539/2