| Title | Paper | Date | Type | ||
|---|---|---|---|---|---|
| 1 |
 |
Vernal Express | 1969-11-06 | unclassified | |
| 2 |
 |
Vernal Express | 1973-11-01 | unclassified | |
| 3 |
 |
Vernal Express | 1975-11-13 | unclassified | |
| 4 |
 |
Vernal Express | 1975-11-20 | unclassified | |
| 5 |
 |
Vernal Express | 1977-11-03 | unclassified | |
| 6 |
 |
Vernal Express | 1977-11-10 | unclassified | |
| 7 |
 |
Vernal Express | 1977-11-17 | unclassified | |
| 8 |
 |
Vernal Express | 1977-11-24 | unclassified | |
| 9 |
 |
Vernal Express | 1978-11-16 | unclassified | |
| 10 |
 |
Vernal Express | 1979-11-08 | unclassified | |
| 11 |
 |
Vernal Express | 1979-11-08 | unclassified | |
| 12 |
 |
Vernal Express | 1979-11-15 | unclassified | |
| 13 |
 |
Vernal Express | 1979-11-22 | unclassified | |
| 14 |
 |
Vernal Express | 1979-11-29 | unclassified | |
| 15 |
 |
Vernal Express | 1980-11-06 | unclassified | |
| 16 |
 |
Vernal Express | 1980-11-13 | unclassified | |
| 17 |
 |
Vernal Express | 1980-11-13 | unclassified | |
| 18 |
 |
Vernal Express | 1980-11-13 | unclassified | |
| 19 |
 |
Vernal Express | 1980-11-20 | unclassified | |
| 20 |
 |
Vernal Express | 1980-11-27 | unclassified | |
| 21 |
 |
Vernal Express | 1981-11-05 | unclassified | |
| 22 |
 |
Vernal Express | 1981-11-12 | unclassified | |
| 23 |
 |
Vernal Express | 1981-11-19 | unclassified | |
| 24 |
 |
Vernal Express | 1981-11-19 | unclassified | |
| 25 |
 |
Vernal Express | 1981-11-26 | unclassified |