@article{https://resolver.caltech.edu/CaltechAUTHORS:SUNpnas07a,
    title = "Evidence for a chemical-thermal structure at base of mantle from sharp lateral P-wave variations beneath Central America",
    journal = "Proceedings of the National Academy of Sciences of the United States of America",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:SUNpnas07a",
    id = "record",
    issn = "0027-8424",
    doi = "10.1073/pnas.0609143103",
    volume = "104",
    pmcid = "PMC1765446"
}