@article{https://resolver.caltech.edu/CaltechAUTHORS:DIEpnas27,
    title = "The Structure of the Atmospheric Absorption Bands of Oxygen",
    journal = "Proceedings of the National Academy of Sciences of the United States of America",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:DIEpnas27",
    id = "record",
    issn = "0027-8424",
    volume = "13"
}


@article{https://resolver.caltech.edu/CaltechAUTHORS:HALpnas15c,
    title = "An attempt to measure the free electricity in the sun's atmosphere",
    journal = "Proceedings of the National Academy of Sciences of the United States of America",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:HALpnas15c",
    id = "record",
    issn = "0027-8424",
    volume = "1"
}