JS1007: Substantiation Data for the Columbia Construction Helicopter BV107-II Flight Manual Supplement, 1974-08-24 - 1974-09-25, Box: 1 , Folder: 6. Shannon Engineering, Inc., records, 8746. Division of Rare and Manuscript Collections. https://aspace3-test.library.cornell.edu/repositories/2/archival_objects/766523 Accessed June 14, 2026.