1. Dental Office Radiation Hazards;Fixott;Oregon D. J,1956
2. Radiation Dangers in Diagnostic Radiology;Kirsh;J. A. M. A,1955
3. A New Roentgenographic Technic for Practicing Dentists;Hielscher;Deutsche Zahnarzteble,1955
4. The Long Cone Technique in Temporomandibular Joint Roentgenography;Freese;New York State D. J,1958
5. Effect of Increasing Target to Film Distance on Intraoral Roentgenographs;Budowsky;New York State D. J,1958