BR (Eastern Region) diagram of signals Connington North 1958
1963 London underground diagram of lines and station index
Midland Railway distance diagram of Saxby and Bourne line 1913
NOVEMBER 1968 PENN CENTRAL OPERATION OF SIGNALS AND INTERLOCKINGS MANUAL
MAY 1964 PRR SPECIAL INSTRUCTIONS FOR OPERATION OF SIGNALS AND INTERLOCKINGS
MERSEYRAIL DIAGRAM OF LINES 1980 (COLLECTORS ITEM)
