| Title | Paper | Date | Type | ||
|---|---|---|---|---|---|
| 1 |
 |
Vernal Express | 1973-06-07 | unclassified | |
| 2 |
 |
Vernal Express | 1973-06-14 | unclassified | |
| 3 |
 |
Vernal Express | 1973-06-21 | unclassified | |
| 4 |
 |
Vernal Express | 1973-06-28 | unclassified | |
| 5 |
 |
Vernal Express | 1978-06-08 | unclassified | |
| 6 |
 |
Vernal Express | 1978-06-15 | unclassified | |
| 7 |
 |
Vernal Express | 1980-06-05 | unclassified | |
| 8 |
 |
Vernal Express | 1980-06-12 | unclassified | |
| 9 |
 |
Vernal Express | 1980-06-26 | unclassified | |
| 10 |
 |
Vernal Express | 1981-06-04 | unclassified | |
| 11 |
 |
Vernal Express | 1981-06-25 | unclassified | |
| 12 |
 |
Vernal Express | 1982-06-02 | unclassified | |
| 13 |
 |
Vernal Express | 1982-06-02 | unclassified | |
| 14 |
 |
Vernal Express | 1982-06-09 | unclassified | |
| 15 |
 |
Vernal Express | 1982-06-09 | unclassified | |
| 16 |
 |
Vernal Express | 1982-06-16 | unclassified | |
| 17 |
 |
Vernal Express | 1982-06-16 | unclassified | |
| 18 |
 |
Vernal Express | 1982-06-23 | unclassified | |
| 19 |
 |
Vernal Express | 1982-06-23 | unclassified | |
| 20 |
 |
Vernal Express | 1983-06-01 | unclassified | |
| 21 |
 |
Vernal Express | 1983-06-01 | unclassified | |
| 22 |
 |
Vernal Express | 1983-06-08 | unclassified | |
| 23 |
 |
Vernal Express | 1983-06-08 | unclassified | |
| 24 |
 |
Vernal Express | 1983-06-15 | unclassified | |
| 25 |
 |
Vernal Express | 1983-06-15 | unclassified |