McCloy, Rory. Whitwam, J. G. text Berlin New York Springer-Verlag c1991 monographic x, 108 p. : ill. ; Endoscopy Endoscopy Quality Control 3540548750 (alk. paper) 0387548750 (alk. paper) https://www.abebooks.com/book-search/title/forum-1991/first-edition/ https://www.abebooks.com/book-search/title/forum-1991/first-edition/ 20260128043033.0