[F. Engels, dialectics and naural science (on the 150th anniersary of his birth)].
D005197:Famous Persons; D005858:Germany; D049672:History, 19th Century; D010684:Philosophy / Q000266:history; D012586:Science / Q000266:history*; D012950:Socialism / Q000266:history
F. Engel's dialektika i estestvoznanie (k 150-letiiu so dnia rozhdeniia)