Essentials of flowcharting / Michel H. Boillot, Gary M. Gleason, L. Wayne Horn. Boillot, Michel H. Gleason, Gary M., joint author. Horn, Lister Wayne, joint author. Computer programming. Flow charts. QA76.6 .B64 1979 001.642 BOE Includes index. Dubuque, Iowa : W. C. Brown Co., c1979. c1979. 1979 Text viii, 145 p. : eng