Interactive COBOL Programmer's Reference.
Data General Corp., westboro MA 1977; 152 pages.
Data General Corp., westboro MA 1977; 152 pages.
Data General Corp., Westboro MA 1978; 220 pages.
DPMA, IL 1963; 498 pages, tables & illustrations; Data Processing Volume VI, proceedings DPMA 1963.
Holt, Rinehart & Winston, NY 1970; 576 pages, index, some illustrations.