TY - CPAPER AU - Petar Petrov TI - MAGNETIC PARTICLES AND POLLENS IN INDOOR AND OUTDOOR SETTLED DUST FROM SEVERAL BULGARIAN CITIES ENVIRONMENTAL IMPLICATIONS T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; SGEM2012 12th International Multidisciplinary Scientific GeoConference PY - 2012 DO - 10.5593/sgem2012/s06.v2008 PB - Stef92 Technology ER -