Lock & quay [microform].
Great Britain.Docks and Inland Waterways Executive.
British Transport Commission.
National Archives (Great Britain).Record Copying Department.
[London : Docks & Inland Waterways Executive],
1949-
Target boards contain class titles assigned by filming organisation: ZPER 86/1-86/5.
Microfilm.
From vol. 5, no. 10 (Oct. 1953) published by: British Transport Commission, Docks and Inland Waterways.