00300nam a2200109 a 450000500170000002000150001708200150003210000160004724500750006326000340013830000180017220251203091754.0  a0824720598  a020.3bENC  aKent, Allen  aEncyclopedia of Library and Information science, Vol.59, Supplement-22  aNew YorkbMarcel Dekkerc1997  a347p.c24 cm.