Safeworking: 'Suburban Interlocked Signal Boxes' ring bound folder of diagrams [Vr, 1940s-90s]; Oaklands NSW - laminated photocopies (3) of large diagrams from the period of the opening of the Vr broad gauge line in October 1938; 'Circular 101 - Remote Control Signalling on Single Lines' [NSW, 1981]; 'Safeworking Signalling' [NSW, 1995]. (6 items)