The Pennsylvania Railroad Technical & Historical Society has published the Summer 2017 issue of its free eZine, The Keystone Modeler.
- Modeling the Pennsylvania Railroad's Flat Car Fleet, Part 13A - Loading a Pennsy F37, by Jack Consoli
- Upgrade an HO Scale X29 with Photo-Etched Parts by Bruce F. Smith
- PRRT&HS Annual Meeting Models – Part 1 by The TKM Staff
You can download TKM at http://www.prrths.com/newprr_files/newPRRKeystoneModeler.htm.