@book{UBHD-1742065, author={Esser, Alfred}, title={Geheimnisvolle Kr{\"a}fte}, subtitle={Utopien d. Menschen}, publisher={Staufen-Verl.}, address={K{\"o}ln [u.a.]}, year={1949}, pages={468 S.}, language={ger}, library={UB [Signatur: M 1539-99]}, }