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220.127.116.11, Letter from Katherine Anne Porter to David P. Heintze, December 25, 1974, Box: 1, Folder: 32, item: 5. Ann Heintze papers, 0005-LIT. Special Collections and University Archives. https://archives.lib.umd.edu//repositories/2/archival_objects/479478 Accessed January 16, 2021.