Roentgenography and Roentgenology of the Middle ear and Mastoid ProcessRoentgenography and Roentgenology of the Middle ear and Mastoid Process. By EtterLewis E., B.S., M.D., F.A.C.R., Professor of Radiology, Western Psychiatric Institute and Clinic, The Falk Clinic School of Medicine, University of Pittsburgh; Consultant, HowardC., Marcy State Hospital, Pittsburgh, Penna. With the collaboration of CrossLawrence C., R.T., Chief Research X-Ray Technician,
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