Крокодил, 1926 , № 23
Krokodil Magazine
Наука и жизнь #03 1997
Nauka i Zhizn Magazine
Крокодил, 1943 , № 42-43
Крокодил, 1977 , № 09
Other Earths
edited by Nick Gevers & Jay Lake
The Apocalypse Reader
Justin Taylor (Editor)