Huamán De La Cruz, Alex Chemical characterization of PM2.5 at rural and urban sites around the metropolitan Area of Huancayo (central Andes of Peru) - Basel MDPI Publishing January 2019 - 17 p. ilus. Subjects--Topical Terms: ATMOSFERACONTAMINACION AMBIENTALELEMENTOS TRAZACALIDAD DEL AIRE Subjects--Geographic Terms: HUANCAYOJUNINPERU