TY  - BOOK
AU  - Beaven,C.H.J.
TI  - The Approximations handbook -- the art of nearly
SN  - 1850581193
U1  - QA/111 
PY  - 1989///
CY  - Wilmslow, United Kingdom
PB  - Sigma Press.
KW  - Arithematic.
ER  -