1941 Along The Right Of Way

[NW Mailing List]

Here's an eBay listing for a 1941 Along The Right Of Way booklet. 
 
http://www.ebay.com/itm/1941-Norfolk-and-Western-Railways-Along-the-Right-of-Way-Brochure-/251491891755
 
Is there a listing anywhere of how many different editions of these were produced? I think they were printed every ten years, but there's no date on any of the four different ones I have. 
 
Thanks.
Vince Albert
 		 	   		  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://six.pairlist.net/pipermail/nw-mailing-list/attachments/20140409/1433b3c4/attachment-0001.htm>