Peter Lefferts
3 works in English-language magazines
| Date | Page | Type | Title | Magazine |
|---|---|---|---|---|
| September 1961 | 172|172.1 | Essay | Letter (Analog, September 1961) | Analog Science Fact -> Fiction, September 1961 |
| January 1962 | 122|122.1 | Essay | Letter (Analog Science Fact -> Science Fiction, January 1962) | Analog Science Fact -> Science Fiction, January 1962 |
| January 1962 | 165|165.1 | Essay | Letter (Analog, January 1962) | Analog Science Fact -> Science Fiction, January 1962 |