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Stajkov, Zachari - In: Statistika : dvumesečno spisanie ; organ na … 6 (1959) 4, pp. 73-83

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Stajkov, Zachari - In: Vătrešna tărgovija : izdanie na Naučnija Centăr po … 10 (1979) 4, pp. 11-21

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Stajkov, Zachari - 1973

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Stajkov, Zachari - In: Contemporary sociology in Bulgaria : Selected studies, (pp. 373-385). 1978

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Georgiev, Ivan; Stajkov, Zachari - In: Godišnik na Sofijskija Universitet Kliment Ochridski / … 7 (1968), pp. 263-336

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