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Rabotno vreme, uslovija na trud, demografsko povedenie
Michova, Genoveva (contributor);  … - 2007
Persistent link: https://www.econbiz.de/10003527358
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Trudut i rabotnoto vreme v NAPS
Andreev, Nikola G. - 1980
Persistent link: https://www.econbiz.de/10001842549
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Planirane i regulirane na vrǔzkata meždu razmera na truda i razmera na potrebnostite : Lekcija
Mastikov, Petǔr - 1983
Persistent link: https://www.econbiz.de/10002431935
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Socialni rezultati na naučno-techničeskija progres
Kirova, Krasimira (contributor) - 1988
Persistent link: https://www.econbiz.de/10000792850
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Uslovija na trud i samoupravlenie
Lazarov, Georgi; Maneva, Evdokija - 1988
Persistent link: https://www.econbiz.de/10000800993
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Čovekăt v naučno-techničeskata revoljucija
Georgiev, Ivan - 1988 - 1. izd
Persistent link: https://www.econbiz.de/10000746525
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Čoveškijat faktor v naučno-techničeskata revoljucija
Markov, Marko (contributor) - 1987 - 1. izd
Persistent link: https://www.econbiz.de/10000752225
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Uslovijata na trud i kačestvoto na zaetostta v Bălgarija : tendencii i vazaimodejstvija
Beleva, Iskra; Canov, Vasil V.; Velkova, Dočka - 2009 - 1. izd.
Persistent link: https://www.econbiz.de/10003966713
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Prinuditelna gʹvkavost i nesigurnost na zaetostta : sociologičeski analiz na kačestvoto na truda v sektorite stroitelstvo i smetosʹbirane v Bălgarija
Kirov, Vasil; Markova, Ekaterina; Pejčeva, Darina - 2014
Persistent link: https://www.econbiz.de/10010532294