Holdings
[1.]1952/3,3-5; [2.]1956,8-9; 4.1959/61,2-4; 5.1962,4; 6.1963,3; 7.1964,1-3,5; 8.1965,1-5; 9.1966,1-2,4-5; 10.1967,1,3,5; 11.1968,5; 12.1969,1,5; 13.1970,1-2,4-5; 14.1971,1-3,5; 15.1972,1; 16.1973,1-4; 17.1974,2-5; 18.1975,1,3-5; 19.1976,1-5; 20.1977,1,3-5; 21.1978,1-5; 22.1979; 23.1980,1-3,5-6; 24.1981 - 41.1998