1.
OKIAKPE EK, JONAH NM, Godstime Nyema C. OPERATIONAL COST CONTROL AND PROFITABILITY OF UPSTREAM OIL AND GAS FIRMS IN NIGERIA. JAII [Internet]. 2026 Feb. 23 [cited 2026 Apr. 16];11(2):1-11. Available from: http://cirdjournals.com/index.php/jaii/article/view/1477