An introduction to programming : a structured approach using PL/I and PL/C / Richard Conway, David Gries ; contributions by John E. Dennis and Jorge Moré. Conway, Richard Walter, 1931- Gries, David, 1939- joint author. PL/I (Computer program language) PL/C (Computer program language) Structured programming. QA76.73.P25 C65 1979 519.92 INT Includes bibliographical references and index. Cambridge, Mass. : Winthrop Publishers, c1979. c1979. 1979 Text xvi, 728 p. : eng Winthrop computer systems series