Secret codes
Presents several easy codes with messages to decode and directions for making and writing with invisible ink and devising one's own code.
F. Watts
1980
9780531041468
book
Holdings
| hid | mid | miid | nid | wid | location_code | location | barcode | callnum | dewey | created | updated |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2997831 | 6459700 | 2407 | 332754 | 470741 | PCE | 301 | PCC0000006 | 001.54 FLE | 1.54 | 1637782573 | 1736800991 |