Mitchell, William Martin, 1932- Keyboarding : a mastering approach, skill developments and business applications, comprehensive / William M. Mitchell, K. A. Mach, James E. LaBarre. - 2nd. ed. - Inc., Chicago : Science Research Associates, 1987. - 230p. R 1-12, I 1-5 ill. 22cm. Includes bibliographical references and index. ISBN: 0574200452 Subjects--Topical Terms: Typewriting.Word processing.