"sokolsky, v n. "
k.e. tsiolkovsky selected works: / v.n. sokolsky - 1 ed. - uk : mir 1968. - ", 337p.; 22 cm."
hard cover
--
629. 4 sok
k.e. tsiolkovsky selected works: / v.n. sokolsky - 1 ed. - uk : mir 1968. - ", 337p.; 22 cm."
hard cover
--
629. 4 sok