International Journal of Physical Science Research - Volume 8, Number 1, 2020
International Journal of Physical Science Research - Volume 8, Number 2, 2020
Mrs. N. U. Ekwere The Managing Editor, Duncan Science publication, 172 Goldie Street, P. O. Box 727, G. P. O., Calabar Cross River State, Nigeria, Tel: +2347038597314 Email:duncanjournal@yahoo.com