Computers, their impact and use : structured programming in PL/1 / Robert E. Lynch, John R. Rice. Lynch, Robert Emmett, 1932- Rice, John Rischard, joint author. PL/I (Computer program language) Structured programming. QA76.73.P25 L96 001.64 LYC New York : Holt, Rinehart, and Winston, c1978. c1978. 1978 Text ix, 442 p. : eng