TY  - BOOK
AU  - Nelson Richard R
TI  - Understanding technical change as an evolutionary process
T2  - F De Vries lecture in economics : Theory, institutions, Policy, 8
U1  - X0gF, M7 
PY  - 1987///
CY  - Amsterdam
PB  - North-Holland          
KW  - Economic IRT Technology
N1  - Bibliography: P 123-25
ER  -