TY  - BOOK
AU  - Held, Gilbert .
ED  - by cor. politecnic instituete of brooklyn
TI  - IBM PC AND PC XT: User's Refence Manual
U1  - 4.125 
PY  - 1987///
CY  - New Delhi : 
PB  - BPB Pub, 
KW  - Programming;Computer programme
ER  -