1975. No Edition Remarks. 509 pages. This is an ex-Library book. Pictorial dust jacket over grey cloth. Aeroacoustics Fan Stol and Boundary Layer Noise Sonic Boom Aeroacoustic Instrumentation Volume 38 of the Progress in Astronautics and Aeronautics Series. Library copy, with expected inserts, stamps and inscriptions. Binding remains firm. Pages are lightly tanned throughout. Boards have light shelf-wear with corner bumping. Slight crushing to spine ends. Unclipped jacket has heavy edgewear with areas of loss, heavy tears, chips, and creasing. Light tanning to spine and edges.