Gammill, Stephen Lane. A programmed introduction to upper gastrointestinal radiology / Stephen Lane Gammill ; foreword by Seymour Fiske Ochsner. - 1st ed. - Boston : Little Brown, c1977. - xiii, 226 p. : ill. ; 28 cm. Includes bibliographies and index. ISBN: 0316302945 Subjects--Topical Terms: Stomach--Radiography--Programmed instruction.Duodenum--Radiography--Programmed instruction.Esophagus--Radiography--Programmed instruction. LC Class. No.: RC804 / .R6 G4