TY  - BOOK
AU  - Ray George F
TI  - Diffusion of nature technologies
T2  - National Institute of Economic and Social Research Occasional Papers. 36
SN  - 0521260086
U1  - X90gF, M4 
PY  - 1984///
CY  - Cambridge
PB  - Cambridge University Press        
KW  - Economics-Industry
ER  -