Carl T. Helmers, Jr.
1 work in English-language magazines
| Date | Page | Type | Title | Magazine |
|---|---|---|---|---|
| June 1970 | 174|174.1 | Essay | Letter (Analog, June 1970) | Analog Science Fiction/Science Fact, June 1970 |
1 work in English-language magazines
| Date | Page | Type | Title | Magazine |
|---|---|---|---|---|
| June 1970 | 174|174.1 | Essay | Letter (Analog, June 1970) | Analog Science Fiction/Science Fact, June 1970 |