MARTIN , Osinde I.; LUSWETI , J.; KIPKEMBOI , P.; ANDITI , B. C.; MUTHOKA , Titus M. Variation of Selected Metal Pollutants with Depth and Seasons in Petroleum Contaminated Soils . African Journal of Education,Science and Technology (AJEST), [S. l.], v. 2, n. 4, p. Pg 181–197, 2015. Disponível em: http://ajest.org/index.php/ajest/article/view/630. Acesso em: 3 apr. 2026.