A. Iyobosa.Timothy and O. Akinade Shadrach, “Assessment of Polycyclic Aromatic Hydrocarbon in Soils and Sediments in Onitsha area, Southeastern, Nigeria”, IJAG, vol. 7, no. 2, pp. 129–138, Sep. 2019, doi: 10.14419/ijag.v7i2.29266.