1. Hehr, Frederick G. Creator: From the Collection: Hapgood, Charles H. Published / Created: 1953-1965 Call Number: YCAL MSS 283 Container / Volume: Box 16, folder 301-302 Image Count: 96 Found in: Beinecke Rare Book and Manuscript Library > Charles H. Hapgood Papers (YCAL MSS 283) > Series II: Writings > The Earth's Shifting Crust / The Path of the Pole > Correspondence > Hehr, Frederick G.
2. Urry, William D. Creator: From the Collection: Hapgood, Charles H. Published / Created: 1953-1954 Call Number: YCAL MSS 283 Container / Volume: Box 17, folder 347 Image Count: 3 Found in: Beinecke Rare Book and Manuscript Library > Charles H. Hapgood Papers (YCAL MSS 283) > Series II: Writings > The Earth's Shifting Crust / The Path of the Pole > Correspondence > Urry, William D.