| 000 | 00331 a2200121 4500 | ||
|---|---|---|---|
| 080 |
_a608.3 _bD 449 |
||
| 245 | 1 | _aDerwent world patents index on STN international WPIDS, WPINDEX database description | |
| 260 |
_aLondon _bDerwent Publications _c1993 |
||
| 650 | _aPatents Index | ||
| 100 |
_a _d |
||
| 300 | _a213 p. | ||
| 901 | _a218002 | ||
| 999 |
_c75889 _d75889 |
||