Não informado. (2017). Dissertation Abstracts: Abstracts of dissertations and monographs in microfilm. University Microfilms.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Dissertation Abstracts: Abstracts of Dissertations and Monographs in Microfilm. Ann Arbor, Mich: University Microfilms, 2017.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Dissertation Abstracts: Abstracts of Dissertations and Monographs in Microfilm. University Microfilms, 2017.
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