Flieger, W. Economic demography and the future of demography. s.n.
Čikaški stil citiranja (17. izdanje)Flieger, Wilhelm. Economic Demography and the Future of Demography. [S.l: s.n.
MLA način citiranja (9. izdanje)Flieger, Wilhelm. Economic Demography and the Future of Demography. s.n.
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