JS1435: Noise Level Evaluation for Increased Landing Weight for DC-8-61 with QNC Plus Acoustic Treatment, 1991-11-26, Box: 16, Folder: 29. Shannon Engineering, Inc., records, 8746. Division of Rare and Manuscript Collections. https://aspace3-test.library.cornell.edu/repositories/2/archival_objects/766961 Accessed June 15, 2026.