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Letopis na statiite ot bălgarskite vestnici : mesečen bjuletin
Narodna biblioteka Sv. Sv. Kiril i Metodij; Narodna … - Sofija : Biblioteka - 21.1972 - 50.2001; damit Ersch. eingest.
Persistent link: https://www.econbiz.de/10000351163
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Letopis na statiite ot bălgarskite spisanija i sbornici : mesečen bibliografski bjuletin
Narodna biblioteka Sv. Sv. Kiril i Metodij; Narodna … - 1972-2001: Sofija : Biblioteka - 21.1972 - 50.2001; damit Ersch. eingest.
Persistent link: https://www.econbiz.de/10000353461
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Bălgarski knigopis / Služebni izdanija i disertacii
Narodna Biblioteka Kiril i Metodij; Narodna biblioteka … - 1974-1998: Sofija : Biblioteka - 78.1974(1974/75) - 101.1997(1997/98)
Persistent link: https://www.econbiz.de/10000353836
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Bibliografija na bălgarskata bibliografija / Godišen ukazatel
Narodna biblioteka Sv. Sv. Kiril i Metodij; Narodna … - Sofija : Narodna Biblioteka - 1963(1965) - 1991(1997); damit Ersch. eingest.
Persistent link: https://www.econbiz.de/10000429770
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Bălgarski knigi, 1878 - 1944 : bibliografski ukazatel ; azbučna poredica
Ivančev, Dimităr (contributor);  … - 2010
Persistent link: https://www.econbiz.de/10000094472
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Labour and population programme : an annotated bibliography
1991
Persistent link: https://www.econbiz.de/10004114040
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Subject guide to publications of the International Labour Office
International Labour Office - Geneva : ILO - Nachgewiesen 1919/64(1967) -
Persistent link: https://www.econbiz.de/10004263227
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Publications of the International Labour Office / [Mehrjahresausgabe]
International Labour Office - Geneva : Off. - 1944/55(1956) - 1954/65(1966) nachgewiesen
Persistent link: https://www.econbiz.de/10004271091
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Annotated bibliography on child labour
1986
Persistent link: https://www.econbiz.de/10004173298
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Annotated bibliography on working time
1986
Persistent link: https://www.econbiz.de/10004054985