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    journal = "Proceedings of the Academy of Natural Sciences of Philadelphia",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20200220-072920683",
    id = "record",
    issn = "0097-3157",
    volume = "88"
}


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    title = "Occurrence of lower Oligocene mammal-bearing beds near Death Valley, California",
    journal = "Proceedings of the National Academy of Sciences of the United States of America",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:STOpnas35d",
    id = "record",
    issn = "0027-8424",
    doi = "10.1073/pnas.21.10.571",
    volume = "21"
}


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    journal = "Journal of Mammalogy",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20191108-093248978",
    id = "record",
    issn = "0022-2372",
    doi = "10.2307/1373910",
    volume = "12"
}