TY  - BOOK
AU  - Thirtle Colin G
AU  -  Ruttan Vernon W
TI  - Role of demand and supply in the generation and diffusion of technical change
T2  - Fundamentals of Pure and Appplied Economics . 21
SN  - 3718603845
U1  - X0gF, M7 
PY  - 1987///
CY  - London
PB  - Harwood Academic Publishers        
KW  -  IRT Technology
KW  - Economic
N1  - Bibliography P 133-62
ER  -