| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| June 1963 |
|
B.S.F.A. Newsletter No. 17 / Vector 19a | BSFA | MAGAZINE | 1 |
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| June 1963 |
|
B.S.F.A. Newsletter No. 17 / Vector 19a | BSFA | MAGAZINE | 1 |