Great Soviet Encyclopedia. Volume 33, 1938 (Q43200334)
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Current Data About Great Soviet Encyclopedia. Volume 33, 1938
(P31) (Q3331189)

(P361) (Q20078554)
(P155)
(P156)

(P407) (Q7737)

(P478) 33

(P577) Saturday, January 1, 1938

(P1476) "Классы — Конкуренция" (language: ru)

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(P1815) 01008005011