TY  - BOOK
AU  - Linstone Harold A Ed.
AU  -  Sahal Devendra Ed.
TI  - Technological substitution:  Forecasting techniques   
SN  - 0444001816
U1  - X9(F):89Q1:(B), L6 
PY  - 1976///
CY  - New York
PB  - Elsevier         
KW  - Technological Industry
ER  -