Tad,
You can get a lot of information about plywood from the Hardwood
Plywood & Veneer Association online. Their email address is:
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The address for their "Story of Hardwood Plywood page is:
http://www.erols.com/hpva/story.html
Their address is: P.O. Box 2789, Reston, VA 20195-0789
Phone: (703) 435-2900
Marsha K. King
Special Projects Archeologist
Kansas State Historical Society