@other{https://resolver.caltech.edu/CaltechETD:etd-02172009-132021,
    title = "Upper Limits on Neutral Associated Photoproduction Cross Sections",
    year = "1967",
    url = "https://resolver.caltech.edu/CaltechETD:etd-02172009-132021",
    id = "record",
    doi = "10.7907/15Q5-M466"
}


@other{https://resolver.caltech.edu/CaltechTHESIS:11302015-103822413,
    title = "Photoproduction of Charged Pion Pairs from Hydrogen at Energies up to 1500 MeV",
    year = "1967",
    url = "https://resolver.caltech.edu/CaltechTHESIS:11302015-103822413",
    id = "record",
    doi = "10.7907/KFYM-DK24"
}