00285nam a2200109 a 450000500170000002000150001708200150003210000160004724500600006326000340012330000180015720251203091754.0  a0824720458  a020.3bENC  aKent, Allen  aEncyclopedia of Library and Information science, Vol.45  aNew YorkbMarcel Dekkerc1990  a420p.c24 cm.