O'Connor, M. (2002). Airfields and airmen, Somme. Leo Cooper.
Lua i Stíl Chicago (17ú heag.)O'Connor, Mike. Airfields and Airmen, Somme. South Yorkshire, England: Leo Cooper, 2002.
Lua MLA (9ú heag.)O'Connor, Mike. Airfields and Airmen, Somme. Leo Cooper, 2002.
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