@other{https://resolver.caltech.edu/CaltechTHESIS:08292019-163400736,
    title = "Cloud Chamber Studies in Cosmic Rays at an Altitude of 30,000 Feet",
    url = "https://resolver.caltech.edu/CaltechTHESIS:08292019-163400736",
    id = "record",
    doi = "10.7907/DVVV-TS23"
}