It is my understanding of the copyright law, (no I am not a lawyer etc etc)
that certain libraries may make a circulating copy and archive the original
for any media materials that are worn out. The provisos are: 1. After a
diligent search you cannot find a new print at a reasonable price. 2. That
you are considered a research library.
Good luck.
Stan Diamond, Manager (814) 863-3100
Audio Visual Services (814) 863-2572 (Fax)
Special Services Bldg (800) 826-0132 Order line
1127 Fox Hill Rd, sxd@psulias.psu.edu
Univ. Park, PA 16803 HTTP://www.libraries.psu.edu/avs/