Experiments in the photographic monitoring of stray x-rays.  I.  General considerations; the choice of film-calibrating radiations in Roentgen therapy at 220 kvp and 1,000 kvp.
D002138:Calibration; D006801:Humans; D010781:Photography; D011879:Radiotherapy Dosage; D014965:X-Rays
PHOTOGRAPHY; RADIOTHERAPY/dosage