Chemical characterization and source apportionment of household fine particulate matter in rural, peri-urban, and urban West Africa - Zhou, Zheng; Dionisio, Kathie L.; Arku, Raphael E.; Koutrakis, Petros; Spengler, John D.; Vallarino, Jose; Coull, Brent; Howie, Stephen; Fornace, Kimberly; Hughes, Allison F.; Agyei-Mensah, Samuel; Ezzati, Majid; et al. (ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2014)