TY  - BOOK
TI  - First A to Z encyclopedia  : O . R (vol 7)
T2  - First A to Z encyclopedia
SN  - 1842364138 ; 9781842364130
U1  - 032.02 23
PY  - 2004///
CY  - Essex : 
PB  - Miles Kelly Publishing , 
KW  - Question and answer
ER  -