@article{article391cabb0,
title   = {Concentrations of Cu, Fe, Mn, and Zn in tropical soils amended with sewage sludge and composted sewage sludge},
author = {Nogueirol, Roberta Corrêa and Melo, Wanderley José de and Bertoncini, Edna Ivani and Alleoni, Luis Reynaldo Ferracciu},
year = {2013},
doi = {10.1007/s10661-012-2761-3},
journal   = {Environmental Monitoring and Assessment}
}