TY  - BOOK
AU  - Held,Gilbert
TI  - IBM PC and PC  XT user's reference manual
AV  - MATH QA76.8.I2595H45 
PY  - 1987///
CY  - Indianapolis
PB  -  : Hayden Books
KW  - IBM PC and PC XT user's reference manual
N1  - Includes index
ER  -