British Railways Board Civil Engineering Department Technical Note No. 20 "Metrication: Paper Sizes, Scales and Units", December 1968. Gives details of information to be put on drawings, paper sizes and folds, etc.
British Railways Board Civil Engineering Department Technical Note No. 20 "Metrication: Paper Sizes, Scales and Units", December 1968. Gives details of information to be put on drawings, paper sizes and folds, etc.