Facchinelli A, Sacchi E, Mallen L. Multivariate statistical and GIS- based approach to identify heavy metal sources in soils[J]. Environmental Pollution, 2001, 114 : 313-324.
[8]
Mann S S, Rate A W, Gilkes R J. Cadmium accumulation in agricultural soils in Western Australia[J]. Water ,4 ir and Soil Pollution, 2002, 141 : 281-297.
[9]
Nieholson F A, Smith S R, Mlo.way B J, et at. An inventory of heavy metals inputs to agricultural soils in England and Wales[J]. The Science of the Total Environment, 2003, 311 : 205-219.
[10]
Wong S C, Li X D, Zhang G, et al. Heavy metals in agricultural soils of the Pearl River Delta, South China [J]. Environmental Pollution, 2002, 119 : 33-44.