Operating O and O-27 Trains Guide Lionel Trains track layout and accessory manual model MDK inc
Operating O and O-27 Trains Guide to Lionel Trains (1984, MDK PB)
Lionel O and O27 Trains Collector's Guide History Archives / Book + Values
Lionel O and O27 Trains 1945-1969 – Motive Power + Rolling Stock / Book + Values
K-1 Operating O and O-27 Trains A Comprehensive Guide 2nd Printing NEW/MINT!!!
Operating O and O-27 Trains A Comprehensive Guide M. Klein & B. Greenberg 1976
Track Layout and Accessory Manual for Lionel Trains, 1979 K-line Operation
