Sobell, Mark G. A practical guide to the UNIX system / Mark G. Sobell. - 3rd ed. - Redwood City, Calif. : Benjamin/Cummings Pub. Co., c1995. - xxxii, 800 p. : ill. ; 24 cm. Includes index. ISBN: 0805375651 LCCN: 94008434 LC Class. No.: QA76.76.O63 / S595 1995 Dewey Class. No.: 005.43