Holdings
1950 - 1953; 1954,Apr.-Dez.; 1955; 1956,Febr.-Juni {u.10}; 1957 - 1959; 1960,2u.6u.8u.10u.12; 1961; 1962,Febr.-Juni {u.4-5}; 1963,1-5; 1965; 1966,2-5; 1967 - 1971/72; 1973,3; 1974,3-4; 1975; 1976,2; 1977,2; 1978,4; 1979,2-3; 1982 - 1991; 1994 - 1997; 1999,1-2u.4; 2000,1u.3-4; 2001; 2002,1-3; 2003 - 2014,3