TY  - BOOK
AU  - Buchnan,R A  .
TI  - Power of the machine: the impact of technology from 1700 to the present day / 
U1  - 609 
PY  - 1992///
CY  - London : 
PB  - Penguin Group , 
KW  - History of technology
KW  - Power of the machine
ER  -