00310nam a2200109 a 450000500170000002000150001708200150003210000200004724500750006726000400014230000180018220251203091754.0  a0824720490  a020.3bENC  aKent, Allen Ed.  aEncyclopedia of Library and Infoemation Science, Vol.49, Supplement-12  aNew YorkbMarcel Dekker, INC.c1992  a361p.c24 cm.