TY  - BOOK
AU  - Pickworth, Gharless N.
AU  - CHARLES N. PICKWORTH
TI  - INSTRUCTIONS FOR THE USE OF A. W. FABER'S IMPROVED CALCULATING RULE
U1  - 510 
PY  - 1761///
CY  - London
PB  - Manufactory Established
KW  - MCE
N1  - 0; 0; 0; 510_000000000000000_PIC
ER  -