Teaching aids for instruction in radiologic study of the gastrointestinal tract.
D041981:Gastrointestinal Tract / Q000000981:diagnostic imaging*; D006266:Health Education; D006801:Humans; D011859:Radiography / Q000266:history*; D013679:Technology, Radiologic / Q000266:history*
GASTROINTESTINAL SYSTEM/radiography; ROENTGENOLOGY/history