http://www.americanradiohistory.com/...zine-Guide.htm
I suggest issues August 1981 and March 1979 (you'll have to fix a typo in the '79 clicked-on URL, or you'll get 1978) for UREI monitor fans.
The 1981 issue also has a fair amount of good general information regarding speakers/measurements (and has some nostalgic advertisements)
I also suggest not relying on a browser plug-in to view the PDF files...for me, they were unreadable until I opened them in adobe reader, as a separate application.