| 000 | 00401cam a2200145 4500 | ||
|---|---|---|---|
| 001 | 0718185544 | ||
| 008 | 180515t2016 xxu||||| |||| 00| 0 eng d | ||
| 020 | _a0718185544 | ||
| 245 | 4 | _aThe GCHQ puzzle book. | |
| 260 |
_aLondon : _bPenguin Books _c2016 |
||
| 300 | _axxii, 336 pages, 40 unnumbered pages of plates : illustrations ; 24 cm | ||
| 690 | _aPuzzles | ||
| 942 | _cBKSTD | ||
| 999 |
_c28338 _d28338 |
||