Helen ATAIKIRU; F. E. OKIEIMEN; E. G. UWUMARONGIE. Research on Concentration and Chemical Speciation of Heavy Met-Als in Urban Soils of Warri, Nigeria. Challenging Issues on Environment and Earth Science Vol. 3, [S. l.], p. 98–106, 2021. DOI: 10.9734/bpi/ciees/v3/1752F. Disponível em: https://stm.bookpi.org/CIEES-V3/article/view/727. Acesso em: 9 jun. 2026.