ナイジェル・グレズリー
↑ biography Archived 2013年7月27日, at the Wayback Machine. 2007年11月15日確認
↑ Report on "2 to 1" Gresley valve gear on L.N.E.R. 3-cylinder locomotives
↑ What were the investment dilemmas of the LNER in the inter-war years and did they successfully overcome them? P33The Railway & Canal Historical Society
↑ were the investment dilemmas of the LNER in the inter-war years and did they successfully overcome them? P34The Railway & Canal Historical Society