Columbia subject headings:
Fedorov, Nikolaĭ Fedorovich, 1828-1903.
Platonov, Andreĭ Platonovich, 1899-1951--Philosophy.
Harvard subject headings:
Fedorov, Nikolaĭ Fedorovich, 1828-1903.
Platonov, Andreĭ Platonovich, 1899-1951--Philosophy.
Princeton subject headings:
Fedorov, Nikolaĭ Fedorovich, 1828-1903.
Platonov, Andreĭ Platonovich, 1899-1951--Criticism and interpretation.