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Kačestvoto v investicionnija proces
Georgieva, Sijka - 1984
Persistent link: https://www.econbiz.de/10001262684
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Kompleksno prognozirane na jerarchični strukturi
Georgieva, Sijka - 1977
Persistent link: https://www.econbiz.de/10002234556
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Nowy system kompleksowego prognozowania zagospodarowania przestrzennego
Georgieva, Sijka - In: Gospodarka planowa : miesie̜cznik poświe̜cony … 33 (1978) 11, pp. 569-574
Persistent link: https://www.econbiz.de/10002234570
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Prognozi i modeli v ikonomikata
Georgieva, Sijka - 1974
Persistent link: https://www.econbiz.de/10002234586
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Techniko-ikonomičesko prognozirane : Osobenosti i sŭvremenni metodi
Georgieva, Sijka - 1972
Persistent link: https://www.econbiz.de/10002234626