The 1995 _Bowker Annual_ has on page 502 "Table 10 / CD-ROM Price
Inventory 1992-1994:  Average Costs by Subject Classification."
Broken down by broad LC Classification, there are columns for
the number of titles and average price per title for each of the
three years.

            Keith R. Stetson             |      (203) 254-4044 x 2184
   Collection Development Librarian      |      (203) 254-4135  (fax)
Nyselius Library, Fairfield University   |
       Fairfield, CT  06430-5195         |   kstetson@fair1.fairfield.edu