@other{https://authors.library.caltech.edu/records/0tkwf-dq711,
    author = "Bradford, Samuel Case and Clinton, John F. and Favela, J. and Heaton, T. H.",
    title = "Results of Millikan Library Forced Vibration Testing",
    year = "2008",
    url = "https://resolver.caltech.edu/CaltechEERL:EERL-2004-03",
    id = "https://authors.library.caltech.edu/records/0tkwf-dq711"
}


@other{https://authors.library.caltech.edu/records/n1zsj-yj341,
    author = "Bradford, Samuel Case",
    title = "Time-Frequency Analysis of Systems with Changing Dynamic Properties",
    year = "2006",
    url = "https://resolver.caltech.edu/CaltechEERL:EERL-2006-02",
    id = "https://authors.library.caltech.edu/records/n1zsj-yj341"
}