@article{https://authors.library.caltech.edu/records/0fmgm-cnp58,
    author = "Arp, Halton C.",
    title = "Galaxy M 31",
    year = "1964",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20151211-113308787",
    id = "https://authors.library.caltech.edu/records/0fmgm-cnp58",
    issn = "0036-8075",
    doi = "10.1126/science.145.3635.952",
    volume = "145",
    number = "3635",
    pages = "952"
}