@other{https://resolver.caltech.edu/CaltechETD:etd-03022007-090722,
    title = "A study of ion beam sputtering of compound materials with laser spectroscopy",
    year = "1990",
    url = "https://resolver.caltech.edu/CaltechETD:etd-03022007-090722",
    id = "record",
    doi = "10.7907/kgvz-n067"
}