B. O. EKPO. Levels and Sources of Trace Metals and TPH in Aerosol Particles in Some Cities of the Niger Delta Region of Nigeria: Statistical Approach. Challenging Issues on Environment and Earth Science Vol. 1, [S. l.], p. 23–44, 2021. DOI: 10.9734/bpi/ciees/v1/7016D. Disponível em: https://stm.bookpi.org/CIEES-V1/article/view/268. Acesso em: 9 jun. 2026.