Hummingbird Journal of Management Science & Entrepreneurship (HUJMSE) Vol. 19 (7) December, 2019. ISSN: 2370-9878 Published by: Hummingbird Publications and Research International, Centre for Trans-Saharan Studies, University of Maiduguri, UNIMAID, Maiduguri, Borno State, Nigeria. E-MAIL: hummingbirdpublications@gmail.com PHONE: +234-802-5604-997 Impact of Occupational Health and Safety Standards on Productivity of Employees […]