TY  - BOOK
AU  - Barbour,Edna H.
TI  - PL/1 : : a self instructional manual
AV  - QTO QA76.5.B3 
PY  - 1970///
CY  - London
PB  - The Macmillan Company
KW  - PL/1 (computer program language)
ER  -