К. Э. Циолковский "На Луне", 1893. Москва, тип. И. Д. Сытина
Author
Александр Эмильевич Гофман (1861-1939)
Licensing
Public domain
Public domain
false
false
The author died in 1939, so this work is in the
public domain
in its country of origin and other countries and areas where the
copyright term
is the author's
life plus 80 years or fewer
.