Walker, Billy K. A structured approach to Pascal / Billy K. Walker. - Homewood, Ill. : R.D. Irwin, 1983. - xiii, 209 p. : ill. ; 24 cm. Includes index. ISBN: 0256028273 Subjects--Topical Terms: Pascal (Computer program language)Structured programming. Dewey Class. No.: 005.113 / WAS 1983