I know as a Librarian, we were taught that an institution may make ONE
copy of a copyrighted item for educational purposes only ( These are
called the Fair Use Guidelines). In order to USE the materials on a
cassette, you should probably copy it into another format as cassettes are
not long lived with regular use.
This is a helpful source:
http://www.utsystem.edu/OGC/IntellectualProperty/ccmcguid.htm

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