Program design concepts : A.S. Philippakis, Leonard J. Kazmier. with applications in COBOL / Philippakis, Andreas S. Kazmier, Leonard J. COBOL (Computer program language) Computer programming. QA76.73.C25 P49 1983 001.642 19 PHP Includes index. New York : McGraw-Hill, c1983. c1983. 1983 Text vi, 217 p. : eng