@book{https://authors.library.caltech.edu/records/p77q1-zg433,
    title = "Isotope tracer studies of diffusion in silicates and of geological transport processes using actinide elements",
    year = "1993",
    url = "https://authors.library.caltech.edu/records/p77q1-zg433",
    id = "record"
}


@book{https://resolver.caltech.edu/CaltechAUTHORS:20160125-095347268,
    title = "Isotopic and Cosmic Chemistry",
    year = "1964",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20160125-095347268",
    id = "record"
}