| Title | General Considerations -- Mitchell Maps -- Faden Maps -- The Sparks 'Red Line' Map -- The Evidence of the Maps |
| Publication Type | Unpublished |
| Authors | Martin, Lawrence |
| Series Title | Collected Copies of Correspondence and Other Memoranda Relating to Col. Lawrence Martin's Studies of the Mitchell Maps, ca.1925-35 |
| Number | Record Group 76 |
| Institution | National Archives |