Columbia subject headings:
Aeronautical engineers--Soviet Union--Biography.
Fedorov, Nikolaĭ Fedorovich, 1828-1903.
Philosophers--Soviet Union--Biography.
T︠S︡iolkovskiĭ, K. (Konstantin), 1857-1935.
Harvard subject headings:
Aeronautical engineers--Soviet Union--Biography
Fedorov, Nikolaĭ Fedorovich, 1828-1903.
Philosophers--Soviet Union--Biography
T︠S︡iolkovskiĭ, K. (Konstantin), 1857-1935.
Princeton subject headings:
Aeronautical engineers--Soviet Union--Biography.
Fedorov, Nikolaĭ Fedorovich, 1828-1903.
Philosophers--Soviet Union--Biography.
T︠S︡iolkovskiĭ, K. (Konstantin), 1857-1935.