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The requested resource could not be found.https://ec.europa.eu/eurostat/portal/page/portal/conferences/documents/34th_ceies_seminar_documents/34th CEIES Seminar/1.1 I. MARX.PDF
https://ec.europa.eu/eurostat/portal/page/portal/conferences/documents/34th_ceies_seminar_documents/34th CEIES Seminar/1.1 I. MARX.PDF