@other{https://resolver.caltech.edu/CaltechETD:etd-04102008-112738,
    title = "Impactors for Aerosol Measurement: Developments and Sampling Biases",
    url = "https://resolver.caltech.edu/CaltechETD:etd-04102008-112738",
    id = "record",
    doi = "10.7907/YG7P-PX37"
}