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Source: Dissertation Abstracts International, Volume: 68-06, Section: A, page: 2548.
Persistent link: https://www.econbiz.de/10009472041
Source: Dissertation Abstracts International, Volume: 67-02, Section: B, page: 1192.
Persistent link: https://www.econbiz.de/10009472346
Persistent link: https://www.econbiz.de/10009472365
Source: Dissertation Abstracts International, Volume: 52-08, Section: B, page: 4523.
Persistent link: https://www.econbiz.de/10009472440