@other{https://authors.library.caltech.edu/records/h9rxq-3p459,
    author = "Vaughan, A. H. and Deutsch, A. J. and Arp, Halton and Sandage, A. R. and Sandage, A. and Preston, G. W. and Humason, Milton and Greenstein, J. L. and Minkowski, Rudolph and Münch, G. and Penston, M. V. and Osterbrock, D. E. and Brucato, Robert and Kraft, R. P. and Schmidt, M. and Sargent, Wallace L. W. and Zwicky, F.",
    title = "Palomar Observatory Hale Telescope : Prime Focus Nebular Spectrograph Log Book",
    year = "1995",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20120207-163633236",
    id = "https://authors.library.caltech.edu/records/h9rxq-3p459"
}


@other{https://authors.library.caltech.edu/records/cjz4h-7y968,
    author = "Greenstein, Jesse L.",
    title = "Astrophysical Research in Space",
    year = "1959",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20120208-112856931",
    id = "https://authors.library.caltech.edu/records/cjz4h-7y968"
}