I second the NEMES site.
Many of the books noted above can be found by searching on: books.google.com
Another site worth trying is: http://www.archive.org
There are Yahoo groups:
Metal Shapers
Atlas Shapers
South Bend had How To Run a Shaper & Drill Press: my copy dates from c.1954
I have heard of a book/ME article (both?) that dates from the 1950s by Duplex.
I expect that ME would have many posts but I am not a digital ME subscriber.
MEW has a three-part article By Don Morris starting in MEW #22, Mar-Apr1994.
Part 2 is in #24 & Part 3 in #25.
The US magazines have some as well:
Popular Mechanics How To Use, June 42; Know Your Shaper, Feb 54; How To Cut Contours, Oct 58.
Popular Science articles: How to Use, Aug 43; How To Cut Keyways, Apr 44.
Edited By David Clark 1 on 30/07/2012 09:35:52