TY  - BOOK
AU  - Helpman Elhanan Ed.
TI  - General purpose technologies and economic growth
SN  - 026208263082632
U1  - X0gF, N8 
PY  - 1998///
CY  - Cambridge
PB  - M I T Press       
KW  - Economic irt Technology
N1  - Bibliography chapterwise
ER  -