Avwiri, G. O., J. Ekpo, and Y. E. Chad-Umoren. “Occupational Hazards from Outdoor and Indoor Radiation in Oil Field Facilities in Rivers State, Nigeria”. Asian Journal of Physical and Chemical Sciences, Vol. 7, no. 4, Nov. 2019, pp. 1-7, doi:10.9734/ajopacs/2019/v7i430099.