William J. Yapp
1 work in English-language magazines
| Date | Page | Type | Title | Magazine |
|---|---|---|---|---|
| March 1968 | 169|169.1 | Essay | Letter (Analog, March 1968) | Analog Science Fiction -> Science Fact, March 1968 |
1 work in English-language magazines
| Date | Page | Type | Title | Magazine |
|---|---|---|---|---|
| March 1968 | 169|169.1 | Essay | Letter (Analog, March 1968) | Analog Science Fiction -> Science Fact, March 1968 |