1.)Aeronautical Research Committee. Reports and Memoranda,
No. 1027 (Ae. 225) "Test of Two Aerofoils, R.A.F.27 and R.A.F.28—
By A.S. Hartshorn, B.Sc. And H. Davies, B.A.—Presented by the
Director of Scientific Research, " His Majesty's Stationery Office, April 1926.
2.)Aeronautical Research Committee. Reports and Memoranda, No. 1383 (Ae. 508-T.3083)
" Wind Tunnel Tests on Aerofoils at Negative Incidences" By K.W. Clark B.Sc., D.I.C. and
B. Lockspeiser M.A.  His Majesty's Stationery Office, Dec. 1930.
3.)Propeller Drawing Collection, 80 Clerget Y.80, National Air & Space Museum, Garber Facility,
Smithsonian Institution, Washington, DC.
4.)Propeller Drawing Collection, 80 Gnome Y.80, National Air & Space Museum, Garber Facility,
Smithsonian Institution, Washington, DC.
5.)Propeller Drawing Collection, 100 Monosoupe L.8.710 C Y.80, National Air & Space Museum,
Garber Facility, Smithsonian Institution, Washington, DC.
6.)Propeller Drawing Collection, Le Rhone 110 G.1380, National Air & Space Museum, Garber
Facility, Smithsonian Institution, Washington, DC.
7.)"Technical Notes, Avro Biplane Type 504 80 H.P. Gnome, T.5., Royal Air Force, His Majesty's Printing Office,
8.)"Historical Significance of the Avro 504", by John Gaertner, Dissertation Univ. of VA. 1986. Pg. 1-33.
9.)Notice to Ground Engineers 1920-28, Air Ministry, Jan. 1929. Avro 504 improvements, Pg.1-45.
10.)"The Avro 504 J/K Aeroplane B3182,  J.L. Terteling, 1972.
11.)"The British Aircraft Standard Catalogue 1920-21",  
12.)"How to Fly and Instruct on an Avro", Spottiswoode, Ballantyne & Co. Ltd.
13.)"Avro Biplane, Type 504.K.", His Majesty's Stationery Office, Air Ministry, June 1923.
14.)Avro, Type 504N, Aeroplane. 180 H.P. Lynx Engine, Air Ministry June 1928.
15.)Encyclopedia of US Military Aircraft Part II, The World War I Production Program, by Robert B. Casari,
Vol. 1 Avro 504 to Bristol Scout, Robert B. Casari, Chilicothe, OH, 1972.
16.)Airplane Servicing Manuals, by Lt. Col. Victor W. Page. Civil Aircraft Authority Manual, 1938.
17.)Flying Training Manual, Part I Flying Instruction.  Air Publication 129. Royal Air Force, His
Majesty's Stationery Office, 1929.
18.)Avro 504N Lynx Aeroplane, Schedule of Spare Parts, Royal Air Force Section Nos. 24PP
and 26PP. Air Ministry, His Majesty's Stationery Office, 1927.
19.)Lynx IV. Aero Engine. Air Ministry, His Majesty's Stationery Office, 1929
Avro 504 Documents
Source: Aeronautical Chamber of Commerce of America, Inc. 1923, pg. 23

Bennche's Checkerboard Airplane Service, Inc. Forest Park, IL. Box 81  (1) 504 K
Brooks, Banks & Smith Corp. Framingham, MA  (1) 504 K
Diggins Aviation Co., 140 No. Dearborn St., Chicago, IL. (1) 504 K
Laurentide Air Service, Ltd. 407 Lake of the Woods Bldg. 10 St. John's St. Montreal Quebec (1) 504K
Jane's Levy Aircraft Co., 2035 Indiana Ave., Chicago, IL. 504 k's
The Laurence Sperry Aircraft Corp., Farmingdale Long Island, NY. (1) 504 K
Standard post WW I Avro advertisements for their aircraft that appeared in Flight and Aeroplane.
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Known North American Owners of Avro 504's in the United States 1920-30's
Technical Notes, Avro Biplane Type
504 80 H.P.Gnome
Original Avro Sales Brochure
Factory Production
A Wide Variety Of Aircraft
Avro 504 Specifications