100 years of radiology: those early years.
Crawford
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PR
D002170:Canada; D005858:Germany; D049672:History, 19th Century; D049673:History, 20th Century; D011861:Radiography, Dental / Q000266:history*; D011871:Radiology / Q000266:history*; D013679:Technology, Radiologic / Q000266:history; D014481:United States