JS998: A Proposal for Studying the Feasibility of a lift Performance Indicating System for Helicopters Financial and Management Proposal, 1974, Box: 2 , Folder: 1. Shannon Engineering, Inc., records, 8746. Division of Rare and Manuscript Collections. https://aspace3-test.library.cornell.edu/repositories/2/archival_objects/767026 Accessed June 15, 2026.