| Digest Vol. 4, No. 01 | Jan | 1997 |
| Digest Vol. 4, No. 02 | Feb | 1997 |
| Digest Vol. 4, No. 03 | Mar | 1997 |
| Digest Vol. 4, No. 04 | Apr | 1997 |
| Digest Vol. 4, No. 05 | May | 1997 |
| Digest Vol. 4, No. 06 | Jun | 1997 |
| Digest Vol. 4, No. 07 | Jul | 1997 |
| Digest Vol. 4, No. 08 | Aug | 1997 |
| Digest Vol. 4, No. 09 | Sep | 1997 |
| Digest Vol. 4, No. 10 | Oct | 1997 |
| Digest Vol. 4, No. 11 | Nov | 1997 |
| Digest Vol. 4, No. 12 | Dec | 1997 |