TY  - BOOK
AU  - Leach,H.W., Beakley, George C.
AU  - x
TI  - The side rule and technical problems solving: x 
SN  - x  
U1  - 510.7823/LES  
PY  - 1966///
CY  - London 
PB  - Macmillan 
KW  - Mathematics
KW  - Slide rule
ER  -