Campbell, Mary. 1-2-3 release 3.1 : the comlete reference / by Mary Campbell. - London : McGraw-Hill, c1991. - 945 p. : ill. Includes bibliographical references and index. ISBN: 0078816998 Subjects--Topical Terms: Computer programs.Lotus 1-2-3 (Computer program) LC Class. No.: QA76.8 / .C3