@other{https://resolver.caltech.edu/CaltechETD:etd-01312006-141144,
    title = "Experiments on the Interaction of a Modulated Electron Beam with a Plasma",
    year = "1959",
    url = "https://resolver.caltech.edu/CaltechETD:etd-01312006-141144",
    id = "record",
    doi = "10.7907/JAAT-0J83"
}


@other{https://resolver.caltech.edu/CaltechETD:etd-01132006-083726,
    title = "A Large-Signal Analysis of Beam-Type Crossed-Field Traveling-Wave Tubes",
    year = "1958",
    url = "https://resolver.caltech.edu/CaltechETD:etd-01132006-083726",
    id = "record",
    doi = "10.7907/5MN5-D881"
}


@other{https://resolver.caltech.edu/CaltechETD:etd-07012004-112216,
    title = "Slow Wave Propagation in Plasma Waveguides",
    year = "1958",
    url = "https://resolver.caltech.edu/CaltechETD:etd-07012004-112216",
    id = "record",
    doi = "10.7907/WNSZ-2Y08"
}


@other{https://resolver.caltech.edu/CaltechETD:etd-12182003-094443,
    title = "I. Plasma Oscillations and Radio Noise from the Disturbed Sun. II. A Field Analysis of the M-Type Backward Wave Oscillator",
    year = "1956",
    url = "https://resolver.caltech.edu/CaltechETD:etd-12182003-094443",
    id = "record",
    doi = "10.7907/NE96-J765"
}


@other{https://resolver.caltech.edu/CaltechETD:etd-03182004-155923,
    title = "Field Theory of Travelling-Wave with Loss: Application to the Study of Attenuator Saturation Effects",
    year = "1956",
    url = "https://resolver.caltech.edu/CaltechETD:etd-03182004-155923",
    id = "record",
    doi = "10.7907/F74C-PD63"
}