TY  - BOOK
AU  - Sticker,Henry
TI  - How to calculate quickly: the art of calculation 
AV  - QA111 .S84 1955
U1  - 511 
PY  - 1955///
CY  - [New York]
PB  - Dover Publications
KW  - Mental arithmetic
N1  - First published in 1945 under title: The art of calculation
ER  -