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.......................................................................I have a 14th edition and a 15th edition.
The costs of textbooks was discussed recently. I just bought the 1997
edition of Encyclopedia Britanica (32 volumes on one CD-ROM) for $100.
The cost of 32 books is $1500, ten times more than the regular price of
the CD-ROM. That little disk came with a powerful search engine....
Ludwik Kowalski