Seasonal variation of 'eta'-alkanes and polycyclic aromatic hydrocarbon concentrations in 'PM IND. 10' samples collected at urban sites of São Paulo State, Brazil - Vasconcellos, Pérola de Castro; Souza, Davi Zacarias de; Magalhães, Dulce; Rocha, Gisele Olímpio da (Water Air Soil Pollution, 2011)