| 000 | 003540000a22001450004500 | ||
|---|---|---|---|
| 008 | 140223b1971 xxu||||| |||| 00| 0 eng d | ||
| 041 | _aENG | ||
| 080 | _aB312 L1 | ||
| 082 | _aB312 L1 | ||
| 245 | _aRelations | ||
| 260 |
_aBletchley _bOpen Univ. Pr. _c1971 |
||
| 440 | _aOpen University M100, 19 | ||
| 650 | _aSET THEORY | ||
| 906 | _aOPEN UNIVERSITY | ||
| 999 |
_c252834 _d252834 |
||