TY - CPAPER AU - Krassi Rumchev TI - AIR QUALITY AND RESPIRATORY HEALTH - COMPARISON BETWEEN TWO CITIES T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 15th International Multidisciplinary Scientific GeoConference SGEM2015, ENERGY AND CLEAN TECHNOLOGIES PY - 2015 DO - 10.5593/sgem2015/b41/s19.110 PB - Stef92 Technology ER -