Let me suggest that anyone interested in making copies of any
copyrighted material write to the U.S. Patent Office and request
information on copyrighted materials.  When I was making rolls back
in the late 1960s and early 1970s I was surprised to find that the
conditions of copyright had changed and copyrights before a certain
date had expired and unless renewed were in the public domain.

It's been many years ago so I can't immediately recall the dates
involved, but I seem to recall that nearly all copyrights issued prior
to 1934 were expired except in the very few cases where a new copyright
had been taken out on the material.

Hal Davis

 [ The U. S. Copyright Act of 1976 changed the old laws, partly due
 [ to pressure from the recording industry in USA and abroad.  See
 [ http://mmd.foxtail.com/Archives/KWIC/C/copyright.html  -- Robbie