Священко, Зінаїда. “OPEC ROLE AND INFLUENCE IN THE STRUGGLE FOR LEADERSHIP IN OIL PRODUCTION IN THE 60 – 70 Ss. XX CENTURY”. EAST EUROPEAN HISTORICAL BULLETIN, no. 6 (February 17, 2018). Accessed November 23, 2024. http://eehb.dspu.edu.ua/article/view/123764.