@other{https://resolver.caltech.edu/CaltechTHESIS:08062015-144055650,
    title = "Theory of the positive column of a gas discharge",
    url = "https://resolver.caltech.edu/CaltechTHESIS:08062015-144055650",
    id = "record",
    doi = "10.7907/B4W0-ST96"
}