@inbook{https://resolver.caltech.edu/CaltechAUTHORS:20181211-135003718,
    title = "Active Galactic Nuclei",
    chapter = "Quasar Evolution and the Growth of Black Holes in the Nuclei of Active Galaxies",
    year = "1989",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20181211-135003718",
    id = "record",
    isbn = "9780792302568",
    doi = "10.1017/S0074180900140926"
}


@inbook{https://resolver.caltech.edu/CaltechAUTHORS:20190806-160707984,
    title = "Active Galactic Nuclei",
    chapter = "An Optical Imaging Search for Gravitational Lenses",
    year = "1989",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20190806-160707984",
    id = "record",
    isbn = "9780792302568",
    doi = "10.1017/S0074180900141038"
}


@inbook{https://resolver.caltech.edu/CaltechAUTHORS:20170301-101543100,
    title = "Active Galactic Nuclei",
    chapter = "Spectral Energy Distributions of PG Quasars",
    year = "1989",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20170301-101543100",
    id = "record",
    isbn = "0-7923-0256-7"
}


@inbook{https://resolver.caltech.edu/CaltechAUTHORS:20181121-084638694,
    title = "Active Galactic Nuclei",
    chapter = "The Milliarcsecond Structure of Active Galactic Nuclei Observed with VLBI",
    year = "1989",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20181121-084638694",
    id = "record",
    isbn = "9780792302568",
    doi = "10.1017/S0074180900141877"
}


@inbook{https://resolver.caltech.edu/CaltechAUTHORS:20170301-103111401,
    title = "Active Galactic Nuclei",
    chapter = "Millimeter Observations of Optically Selected Quasars",
    year = "1989",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20170301-103111401",
    id = "record",
    isbn = "0-7923-0256-7"
}


@inbook{https://resolver.caltech.edu/CaltechAUTHORS:20190807-073308925,
    title = "Active Galactic Nuclei",
    chapter = "Discovery of a Probable Gravitational Lens",
    year = "1989",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20190807-073308925",
    id = "record",
    isbn = "9780792302568",
    doi = "10.1017/S007418090014104X"
}