Holdings
16.1963,95; 22.1966,129u.132; 23.1967,136u.137; 24.1967,142-144; 25.1968,149; 26.1968,154; 27.1969,160-162; 28.1969,166u.168u.169; 29.1970,172u.174; 31.1971,182; 32.1971,192; 33.1972,197; 34.1972,200; 36.1973,213; 37.1974,219u.221; 38.1974,226u.229; 39.1975,230-233; 40.1975,236-240