TY - JOUR A1 - Polidori, A. A1 - Cheung, K. L. A1 - Arhami, M. A1 - Delfino, R. J. A1 - Schauer, J. J. A1 - Sioutas, C. T1 - Relationships between size-fractionated indoor and outdoor trace elements at four retirement communities in southern California JO - Atmos. Chem. Phys. J1 - ACP VL - 9 IS - 14 SP - 4521 EP - 4536 Y1 - 2009/07/15 PB - Copernicus Publications SN - 1680-7324 UR - http://www.atmos-chem-phys.net/9/4521/2009/ L1 - http://www.atmos-chem-phys.net/9/4521/2009/acp-9-4521-2009.pdf DO - 10.5194/acp-9-4521-2009 ER -