Official catalogue of the International Electrical Exhibition, Philadelphia, commencing September 2, 1884, under the auspices of the Franklin Instiute of the State of Pennsylvania for the Promotion of the Mechanic Arts
International Electrical Exhibition (1884 : Philadelphia, Pa.) Search this
Note on the Aerodrome of Mr. Langley Prepared for the Conversazione of the American Institute of Electrical Engineers. Multiple copies
Langley, S. P. (Samuel Pierpont), 1834-1906 Search this
Box 43, Folder 7
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Samuel P. Langley Collection, NASM.XXXX.0494, National Air and Space Museum, Smithsonian Institution.