[Box/folder no. or item name], Mary Isabel Hill and John Lawler Costello collection on the USC College of Aeronautics, Collection no. 5372, University Archives, Special Collections, USC Libraries, University of Southern California
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[Box/folder no. or item name], Mary Isabel Hill and John Lawler Costello collection on the USC College of Aeronautics, Collection no. 5372, University Archives, Special Collections, USC Libraries, University of Southern California https://archives.usc.edu/repositories/3/resources/3134 Accessed March 28, 2024.