Well, in Poland it was published under the title Czlowiek z Marsa (Man from Mars) in 1946 by "Nowy Swiat Przygod" (A New World of Andventures). I'm not sure whether it was a publishing house...
I read that this book's history is somewhat complicated. As it was said, it was published by a newspaper (maybe this "Nowy Swiat Przygod" was a newspaper? On the other hand, I heard that the newspapers name was "Co tydzien nowe opowiadanie" (One story every week)). On the other hand, it was also published in some fanzine, illegally.
One more thing. The book was first published in Germany (titled "Der Mensch vom Mars") in 1989 by Insel (in Frankfurt am Main), translated by H. Rottensteiner.
Cheers!