This fourth and final volume in the series covers the following railroads: PRR, PC, P&PU, P&S, P&LE, QNSL, RDG, R&N, RF&P, RUT, SBC, SBD, SCL, Sierra, SLSF, SOO, SP, SSW, SR, SP&S, TC, TP&W, TRRA, USA, USAF, USN, URR, UP, WA, WARN, WT, WM, and WP
Softcover, 96 pages, standard landscape format, Color photographs.