1. HUMAN ERRORS AND TRANSPORT ACCIDENTS
2. MINISTRY OF TRANSPORT REPORTS ON COLLISIONS 1953 , Harrow and Wealdstone ( 8th October 1952); 1955, Betley Road (17th November 1954); 1958, Staines (9th August 1957); 1958, Milngavie (7th December 1957); 1960, Slade Lane (23rd November 1959); 1960, Waterloo (3rd June 1960); 1961 New Mills (12th October 1960); 1961, Cannon Street (20th March 1961); 1964, Bradford (Exchange) (3rd June 1964) . ( London H.M.S.O .).