| CD-ROM disk | create date | obs date | scan range |
| 1 | 1997/05/08 | 1995/05/27-1997/02/13 | 00000179-00009816 |
| 1 | 1997/05/08 | 1995/05/27-1997/02/13 | b0009817-b0057999 |
| 2 | 1997/12/30 | 1997/02/13-1997/07/17 | b0058000-b0099999 |
| 3 | 1997/12/31 | 1997/07/17-1997/09/16 | b0100000-b0139999 |
| 4 | 1998/01/16 | 1997/09/16-1997/11/20 | b0140000-b0171389 |