Category Description: Source and look-up information.
Civil Engineering 101: Mountain Climbing
Model Railroader 2004-09 pg. 92 Scale: (none) Author: Carl Swanson
How grades are calculated, keyword definitions.
Key System Scrapbook from Charles Smiley Comes in Two Parts
Model Railroad News 2008-11 pg. 74 Scale: Author: John Sipple
These two DVDs show how Oakland, CA was connected to San Francisco with electric rails.