Ze Bilo’o Philemon, et al. “Pollution Evaluation and Risk Assessment of Polycyclic Aromatic Hydrocarbons (PAHs) in Water and Coastal Sediment from Two Rivers in Douala-Cameroon”. Current Advances in Geography, Environment and Earth Sciences Vol. 3, Apr. 2022, pp. 120-32, doi:10.9734/bpi/cagees/v3/2055B.