TY  - BOOK
AU  - Cassel,Don
TI  - PL 1: a structured approach 
SN  - 0879096500
U1  - 001.6/425 
PY  - 1978///
CY  - Reston, Va.
PB  - Reston Pub. Co.
KW  - PL/I (Computer program language)
N1  - Edition for 1972 published under title: Programming language one; Includes index
ER  -