Higgins, Robert W. and Constantine C. Pappas. An Experimental Investigation of the Effect of Surface Heating on Boundary-Layer Transition on a Flat Plate in Supersonic Flow, Washington, D.C.: National Advisory Committee for Aeronautics, Technical note 2351, 1951, Box: 5, Item: FD-11. Hans A. Einstein Flow collection, MS-89/4. Water Resources Collections & Archives. https://public.ucrlib.aspace.cdlib.org/repositories/5/archival_objects/581652 Accessed April 20, 2025.