TY  - BOOK
AU  - Mansfield,Edwin
TI  - The economics of technological change
U1  - 338.973 
PY  - 1968///
CY  - New York
PB  - W. W. Norton
KW  - Technological innovations
KW  - United States
KW  - Research, Industrial
N1  - Bibliographical footnotes
ER  -