This is a list of the periodicals I have. At some point I may compile a list of the issues I have, and possibly even the articles I found useful.
Note that many of these periodicals are no longer published. While they are readily available online and at train shows, has many of them available for browsing online in their entirety.
To search for a specific article, Kalmbach/Model Railroading has the Model Train Magazine Index which covers all of the printed Model Railroading magazines, not just Model Railroader. 
Showing 18 items
B&O Modeler B&O Historical Society 
CNWHS Modeler CNW Historical Society 
Great Model Railroads Kalmbach 
How To Build Realistic... Kalmbach Model Railroader Special Issues 
Keystone Modeler PRR Technical & Historical Society Keystone Modeler 
Mainline Modeler Hundman Publishing  
Model Railroader Kalmbach 
Model Railroad Hobbyist Model Railroad Hobbyist 
Model Railroading Highlands Station 
Model Railroad Planning Kalmbach 
Prototype Modeler Prototype Modeler Inc 
Prototype Railroad Modeling Journal Speedwitch Media 
Railmodel Journal Golden Bell Press 
Railroad Model Craftsman Carston Publishing 
Railway Prototype Cyclopedia RP Cyc Publishing Railway Prototype Cyclopedia 
Seaboard - Coast Line Modeler ACL & SCL Historical Society 
Shoreliner NH Historical & Technical Association 
Speedwitch NH Historical & Technical Association 
Showing 18 items