Holdings
31.1973,14; 32.1974,13-22u.24-26; 33.1975,1-4u.6-13u.15-19u.21-26; 34.1976,1-2u.4-22u.26-27; 35.1977,3-5u.7-10u.12-18u.20-23u.27; 36.1978,1-2u.4u.8-13u.15-32; 37.1979,1-2u.4-8u.11-26; 38.1980,1-11u.14-16u.18-26; 39.1981; 40.1982,1-24u.26-27; 41.1983 - 42.1984; 43.1985,1-18u.20-21u.27; 44.1986,1-7u.11-16u.18-26; 45.1987,1-6u.8-27; 46.1988,1u.3-25; 47.1989 - 48.1990; 49.1991,1-2u.4-13; 50.1992 - 52.1994; 53.1995,1-5