@article{articleb4baad42,
title   = {Magnetic study of Brazilian pets from São Paulo state},
author = {Berquo, Thelma and Thompson, Roy and Partiti, Carmen Silvia de Moya},
year = {2004},
doi = {10.1016/s0016-7061(03)00206-4},
journal   = {Geoderma}
}