@article{https://resolver.caltech.edu/CaltechAUTHORS:NEHpr55,
    title = {"Knee" of the cosmic-ray latitude curve},
    journal = "Physical Review",
    year = "1955",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:NEHpr55",
    id = "record",
    issn = "0031-899X",
    doi = "10.1103/PhysRev.98.845",
    volume = "98"
}


@article{https://resolver.caltech.edu/CaltechAUTHORS:NEHpr53,
    title = "Fluctuations and latitude effect of cosmic rays at high altitudes and latitudes",
    journal = "Physical Review",
    year = "1953",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:NEHpr53",
    id = "record",
    issn = "0031-899X",
    doi = "10.1103/PhysRev.90.655",
    volume = "90"
}