Ogugua SPO. THE RESPONSE OF THE PRODUCTIVITY OF PHARMACEUTICAL FIRMS TO HUMAN CAPITAL INVESTMENT: EVIDENCE FROM NIGERIA. IRJAFB [Internet]. 2025 Mar. 19 [cited 2025 Apr. 24];15(8):20-31. Available from: https://zapjournals.com/Journals/index.php/irjafb/article/view/2177