Ralph Letsch
2 English-language books
| Year | Type | Title | Author(s) |
|---|---|---|---|
| 2008 | Nonfiction | Mamer 2007: Science Fiction & Hugo Gernsback | Ralph Letsch |
| 2010 | Nonfiction | Hugo Gernsback, an Amazing Story: 1884 Luxembourg - 1967 New York | Luc Henzig & Paul Lesch & Ralph Letsch |