MSS 0902, Winthrop Topliff Doolittle, Sr., button collection, Special Collections, University of Delaware Library, Newark, Delaware.
MSS 0902, Winthrop Topliff Doolittle, Sr., button collection, Special Collections, University of Delaware Library, Newark, Delaware. https://findingaids.lib.udel.edu/repositories/2/resources/2023 Accessed June 02, 2024.
