Seasonal Variation in Petroleum Hydrocarbon Concentrations in Surface Water, Sediment, Crab (Callinectes sapidus), and Periwinkle (Tympanotonus fuscatus) from the New Calabar River, Nigeria. IAUE-JACS [Internet]. 2026 Apr. 30 [cited 2026 Oct. 27];1(1):26-37. Available from: https://iauejournals.com/index.php/JACS/article/view/138