TY  - GEN
AU  - Mokyr Joel
TI  - Twenty five centuries of technological change : : an historical survey 
SN  - 03718649365
AV  - HC79.T4  
PY  - 1990///
CY  - New York : 
PB  - Harwood Academic Publishers, 
KW  - Technological innovations
KW  - Economic aspects
KW  - History
ER  -