Also, the most recent edition is from 1991.  And a lot of info in it is from the 
previous edition (circa 1978 or so).  So it's not super up-to-date.  Most libraries have at least one edition if you're looking for something specific.  
There is a great web site for finding old/out of print/rare books & I can't for the life of me remember it.  I'll do some surfing and see what I can come up with.
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SilverTurtle
Phi Beta Fraternity: National Professional Association for the Creative & Performing Arts