Keats, Theodore E. Atlas of normal roentgen variants that may simulate disease / Theodore E. Keats, Mark W. Anderson. - 9th ed. - Philadelphia : Elsevier/Saunders, c2013. - xvii, 759, 33 p. : chiefly ill. ; 32 cm. Includes index. ISBN: 9780323073554 (hbk.) Subjects--Topical Terms: Radiography, Medical--Atlases.Diagnostic errors--Atlases.Radiography--Atlases.Artifacts--Atlases.Diagnostic Errors--Atlases.