| 000 | 00417cam a22001337a 4500 | ||
|---|---|---|---|
| 008 | 180718b1969 xxu||||| |||| 00| 0 eng d | ||
| 082 | _aT25084 M318 | ||
| 100 | _aMansfield, Edwin | ||
| 245 |
_aThe economics of technological change _cby Edwin Mansfield |
||
| 260 |
_aLondon _bLongmans _c1969 |
||
| 300 | _a257p. | ||
| 650 | _aResearch, Industrial --United States. | ||
| 650 | _aTechnological innovations --United States | ||
| 999 |
_c372958 _d372958 |
||