Okoro, Gospel Onyebuchi. “TOTAL QUALITY MANAGEMENT PRACTICES AND OPERATIONAL PERFORMANCE OF OIL AND GAS FIRMS IN RIVERS STATE.  ”. BW Academic Journal 1, no. 3 (July 25, 2024): 121–151. Accessed July 28, 2026. https://bwjournal.org/index.php/bsjournal/article/view/2107.