TY  - BOOK
AU  - Mansfield,Edwin
TI  - Technological change: An introduction to a vital area of modern economics 
PY  - 1971///
CY  - New York
PB  - W.W. Norton & Company., Inc.
KW  - Economics
KW  - Public policy
KW  - Technological change
N1  - Includes index
ER  -