Holdings
29.1959 - 36.1966; 37.1967,1-3u.6-12;38.1968; 39.1969,1-7u.10-12, 40.1970 - 43.1973; 44.1974,1-10u.12; 45.1975; 46.1976,1-4u.6-12; 47.1977,1u.3-7u.10-12; 48.1978,1-7u.10.12; 49.1979,1u.3-12; 50.1980,1-7u.10-12; 51.1981,1-2u.4-5u.7-11; 52.1982,1-5u.7-12; 53.1983,1-7u.10-12; 54.1984; 55.1985,2u.4-12; 56.1986,2-3u.5u.8/9-10