00523nam a2200169 a 450000500170000002000150001708200150003210000160004724500750006326000400013830000180017869000490019696400190024599700120026499900170027695200600029320251203091754.0  a082472058X  a020.3bENC  aKent, Allen  aEncyclopedia of Library and Information science, Vol.58, Supplement-21  aNew YorkbMarcel Dekker, INC.c1996  a352p.c24 cm.  aEncyclopedia-Library and Information science  bEngcdefg_  a84132 C  c52187d52187  00104070aPUbPUd1998-04-08l0o020.3 ENCp84132yBK