TY  - BOOK
AU  - Linstone Harold A ed
AU  -  Sahal Devendra ed
TI  - Techonological substitution :  forcasting  techniques and applications
U1  - X:744:B2810bF, L6 
PY  - 1976///
CY  - N.Y
PB  - Elsevier       
KW  - ECONOMICS
ER  -