1. Christensen's physics of diagnostic radiology;Curry,1990
2. Christensen's physics of diagnostic radiology;Curry,1990
3. Christensen's physics of diagnostic radiology;Curry,1990
4. Use of E-speed film with added filtration;Ponce;Oral Surg Oral Med Oral Pathol,1986
5. Energy-selective filtration of dental x-ray beams;Gelskey;Oral Surg Oral Med Oral Pathol,1981