References
- The Ulster Unionist Party, 1882-1973: Its Development and Organisation by John F. Harbinson (Blackstaff Press, Belfast, 1973)
- Biographies of Members of the Northern Ireland House of Commons by David Boothroyd
- In Time of War: Ireland, Ulster and the Price of Neutrality 1939-45 by Robert Fisk (André Deutsch, 1983)
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