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- John Winston Graham Aeronautical Collection (Beinecke Rare Book and Manuscript Library)39
- ebrary, Inc33
- Project Muse13
- Chartered Institution of Building Services Engineers12
- Hudson, Kenneth12
- Harrison, Roy M., 1948-11
- Hester, R. E. (Ronald E.)11
- ProQuest (Firm)11
- Adam Matthew Digital (Firm), digitiser9
- British Broadcasting Corporation9
- Institution of Civil Engineers (Great Britain)9
- British Standards Institution8
- Building Research Establishment8
- Cameron, Julia Margaret, 1815-18797
- Metropolitan Museum of Art (New York, N.Y.)7
- National Portrait Gallery (Great Britain)7
- Rolt, L. T. C., 1910-19747
- Geological Survey of Great Britain6
- Great Britain. Fuel Research Board6
- Lees, Frank P.6