Here's a period newspaper article (1958) offering what may be the same (or a similar) booklet from the Philatelic Institute of Cambridge, Mass.:

In trying to identify "The Philatelic Institute" (an organization I never heard of before) a Google search brings up the fact that it was a division of the infamous H.E. Harris & Co. stamp dealer. If that's accurate, I'm not sure how "The Philatelic Institute" could be referred to as a non-profit organization, though.
