Etta , O. E., E. Ekpe, U. C. Inyang, . N. Udeme, and . C. E. Ekpenyong. “ South-South Nigeria”.
GSC Biological and Pharmaceutical Sciences
, vol. 11, no. 2, May 2020, pp. 130-8, doi:10.30574/gscbps.2020.11.2.0122.