File "The Invisible Keys" Notes, contracts, 2017 undated Mixed Materials 8, Folder 6 In: David Cope Papers, 1907-2023 (majority within 1980s-2000s) » Writings » Books
File "The Invisible Keys" (English & Chinese), 2018 Mixed Materials 8, Folder 7 In: David Cope Papers, 1907-2023 (majority within 1980s-2000s) » Writings » Books
File "The Invisible Keys" reviews, 2018 Mixed Materials 8, Folder 8 In: David Cope Papers, 1907-2023 (majority within 1980s-2000s) » Writings » Books
File "The Invisible Keys" edits, undated Mixed Materials 8, Folder 9 In: David Cope Papers, 1907-2023 (majority within 1980s-2000s) » Writings » Books
File Revised pages for "The Invisible Keys", undated Mixed Materials 8, Folder 10 In: David Cope Papers, 1907-2023 (majority within 1980s-2000s) » Writings » Books
File "The Invisible Keys" proof copy, undated Mixed Materials 8, Folder 11 In: David Cope Papers, 1907-2023 (majority within 1980s-2000s) » Writings » Books
File "The Invisible Keys" draft, undated Mixed Materials 8, Folder 12 In: David Cope Papers, 1907-2023 (majority within 1980s-2000s) » Writings » Books
File "The Invisible Keys" Manuscript, second to last major revision, undated Mixed Materials 8, Folder 13 In: David Cope Papers, 1907-2023 (majority within 1980s-2000s) » Writings » Books
File "Masks of Six Decades" manuscript with corrections, 2003-2010 Mixed Materials 8, Folder 14 In: David Cope Papers, 1907-2023 (majority within 1980s-2000s) » Writings » Books
File "Masks of Six Decades" printed copy & invoice, 2003-2010 Mixed Materials 8, Folder 15 In: David Cope Papers, 1907-2023 (majority within 1980s-2000s) » Writings » Books