Passenger Guard Issue No. 4.
British Rail Pay And Efficency, Alterations And Additions To Rule Book
GWR Booklet - Alterations And Additions To Rule & Regulations Book - July, 1930
BR Rule Books and alterations and additions including single line working
Metropolitan Rule Book 1933 With Alterations And Additions
LNER Alterations Of & Additions to The Company’s Book of Rules For Dec 1947
Alterations & Additions to General Appendix to Rule Book – British Rail 1959
