@book{https://resolver.caltech.edu/CaltechBOOK:1981.004, title = "The Theodore von Kármán Collections at the California Institute of Technology: guide to the original collection and a microfiche edition", year = "1981", url = "https://resolver.caltech.edu/CaltechBOOK:1981.004", id = "record" } @book{https://resolver.caltech.edu/CaltechBook:1977.002, title = "The Robert Andrews Millikan collection at the California Institute of Technology : guide to a microfilm edition", year = "1977", url = "https://resolver.caltech.edu/CaltechBook:1977.002", id = "record" }