TY - JOUR A1 - Spencer, M T A1 - Shields, L G A1 - Prather, K A T1 - Simultaneous measurement of the effective density and chemical composition of ambient aerosol particles. Y1 - 2007/02/15 N1 - R832415 N1 - R832415C001 N1 - R827354 N1 - R831083 JF - ENVIRONMENTAL SCIENCE & TECHNOLOGY J1 - ENVIRON SCI TECHNOL J2 - ENVIRONMENTAL SCIENCE & TECHNOLOGY J3 - Enviornmenal Research VL - 41 IS - 4 SP - 1303 EP - 1309 ER -