00305nam a2200109 a 450000500170000002000150001708200150003210000160004724500740006326000400013730000180017720251203090556.0  a0824720423  a020.3bENC  aKent, Allen  aEncyclopedia of Library and Information Science, Vol.42, Supplement-7  aNew YorkbMarcel Dekker, INC.c1987  a428p.c24 cm.