@other{https://resolver.caltech.edu/CaltechTHESIS:06262014-113258422,
    title = "An economic air pollution control model-application : photochemical smog in Los Angeles County in 1975",
    url = "https://resolver.caltech.edu/CaltechTHESIS:06262014-113258422",
    id = "record",
    doi = "10.7907/hxbp-pc89"
}