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    title = "Spectrum analysis of strong-motion earthquakes",
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    url = "https://resolver.caltech.edu/CaltechAUTHORS:20140805-165113746",
    id = "record",
    issn = "0037-1106",
    volume = "43"
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    url = "https://resolver.caltech.edu/CaltechAUTHORS:20140804-105607833",
    id = "record",
    issn = "0037-1106",
    volume = "19"
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