@other{https://resolver.caltech.edu/CaltechETD:etd-06172004-111601,
    title = "Methods for sulfate air quality management with applications to Los Angeles",
    url = "https://resolver.caltech.edu/CaltechETD:etd-06172004-111601",
    id = "record",
    doi = "10.7907/WWJR-PJ15"
}