@book{UBHD-1090893, author={Spengler, Oswald}, title={Welthistorische Perspektiven}, edition={16. - 30. Aufl.}, publisher={Beck}, address={M{\"u}nchen}, year={1922}, pages={VII, 635 S.}, language={ger}, library={UB [Signatur: B 1428-45::2 (30)] ; PI [Signatur: <PI> B 1936,1::2] ; WS [Signatur: WS/CI 4700 U61-2]}, }