Kernighan, Brian W. The UNIX programming environment / Brian W. Kernighan and Rob Pike - New Delhi : Prentice-Hall, c1999. - x, 357 p. : ill. ; 23 cm. ISBN: 8120304993 LCCN: Subjects--Topical Terms: Computer operating systemsProgramming languagesComputer science LC Class. No.: K39u / . 1999 Dewey Class. No.: 005.365