MEDICAL X-RAY UNITS IN THE CITY OF BALTIMORE: FINDINGS OF THE 1963 PILOT SURVEY.
D015142:Baltimore; D005471:Fluoroscopy; D006801:Humans; D008396:Maryland; D011835:Radiation Protection; D011859:Radiography; D011871:Radiology; D013223:Statistics as Topic; D013672:Technology; D013679:Technology, Radiologic; D014965:X-Rays
FLUOROSCOPY; MARYLAND; RADIATION PROTECTION; RADIOGRAPHY; STATISTICS; TECHNOLOGY, RADIOLOGIC