Erickson, Fritz J. Effective Lotus 1-2-3, release 2.3 / Fritz J. Erickson, John A. Vonk. - Dubuque, IA : Business an Educational Technologies, c1994. - 1 v. (various pagings) : ill. ; 28 cm. Includes index. ISBN: 0697239551 Subjects--Uniform Titles: Lotus 1-2-3 (Computer file) Subjects--Topical Terms: Business--Computer programs.Electronic spreadsheets. Dewey Class. No.: 005.369