Holdings
1994, 1(690)-34,36-52(74); 1995, 1/2(742/743)-52(793); 1996, 1(794)-40,43-52(845); 1997, 1/2(843/847)-8; 1998, 4-52; 1999, 1(950)-52(1001); 2000, 1(1002)-52(1053); 2001, 1(1054)-52(1105); 2002, 1/2(1106/1107)-52; 2003, 1/2(1158/1159)-52(1209); 2004, 1(1210)-52(1261); 2005, 1/2(1262/1263)-32,35-53(1313); 2006, 1/2(1314/1315)-52(1365); 2007, 1/2(1366/1367)-52(1417); 2008, 1/2(1418/1419)-37,39-51; 2009, 4(1473)