The Spring 2011 issue of The Keystone Modeler is online at
http://www.prrths.com/newprr_files/newPRRKeystoneModeler.htm

Articles include:

Walthers HO-Scale PRR PS21b Sleeper by Andy Miller
Prr GL and GLca Hoppers, Part II by Jim Hunter
Walthers/Proto 2000 PRR EP-3 – The EMD E7 by Jack Consoli
 
Enjoy!
 
 
Ben Hom