Copeland, Cody T. Understanding and using MS-DOS/PC-DOS : a complete guide / Cody T. Copeland, Jonathan Bacon. - St. Paul : West Pub. Co., c1987. - xviii, 262, [29] p. : ill. ISBN: 031434747X (pbk.) Subjects--Topical Terms: MS-DOS (Computer operating systems)PC DOS (Computer operating systems) LC Class. No.: QA76.76.O63 / C666 1987 Dewey Class. No.: 005.4/46�19