Holdings
15.1989,8.10.12; 16.1990,1.3-11; 17.1991,1.3.-11; 18.1992,1.7-9.11-12; 19.1993,1-6.10-11; 20.1994,2-3.5.9.; 21.1995,3-7,9-12; 22.1996,1-6.8-9.11-12; 23.1997,1-10; 24.1998,1-3.5-7.10; 25.1999,5.10.12; 26.2000,3 - 35.2009; 36.2010,1-2u.4-12; 37.2011 - 40.2014; 41.2015,1-5u.7-12; 42.2016 - 43.2017; 44.2018,1-6u.8-12; - 2019,1 - 2020,9