Chorafas, Dimitris N. Fourth and fifth generation programming languages : wich Unix, AT&T, IBM, and other standard bearers / Dimitris N. Chorafas - vol. 2 - New York : McGraw-Hill Book, 1987 - 374 p.; 22 cm. - Computer Science . ISBN: 0071001662 Subjects--Topical Terms: LENGUAJES DE PROGRAMACION Universal Decimal Class. No.: 519.68