@article{https://resolver.caltech.edu/CaltechAUTHORS:20151211-113308787,
    title = "Galaxy M 31",
    journal = "Science",
    year = "1964",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20151211-113308787",
    id = "record",
    issn = "0036-8075",
    doi = "10.1126/science.145.3635.952",
    volume = "145"
}