Holdings
172.1966,881 - 173.1967,886; 175.1968,898 - 176.1968,904; 178.1969,916; 179.1970,918; 179.1970,922; 181.1971,929; 181.1971,931 - 183.1972,943; 184.1972,947 - 185.1973,952; 186.1973,959 - 186.1973,961; 187.1974,966 - 188.1974,972; 190.1975,978; 195.1981,991/992; 195.1982,995; 196.1983,998
Holdings gaps
[N=175.1968,901; 183.1971,935; 183.1971,940]