DAVID ONWUCHEKWA, PH.D; ONYEMEZIKEYA, OBUBELEYE GEORGE. TRANSPORTATION MODEL AND COST CONTROL OF PLASTIC MANUFACTURING FIRMS IN PORT HARCOURT. BW Academic Journal, [S. l.], v. 2, p. 149–160, 2025. Disponível em: https://bwjournal.org/index.php/bsjournal/article/view/2772. Acesso em: 27 jun. 2026.