Holdings
1956,10-13u.15-18u.20-21u.23-25u.36-52; 1957,2-3u.6-14u.16-22u.24u.26-28u.31-52; 1958,1-24u.26-33u.34-35u.40-41u.43-52; 1959,1-19u.24-39u.42-52; 1960; 1961,1-2u.4-5u.7-10u.12-39u.41-43u.45-50u.52; 1962,1-2u.4-8u.10-32u.35-52; 1963,3-24u.26-44u.47-52; 1964,1-2u.4-37u.39u.41-52; 1965,1-34u.36-41u.43-52; 1966 - 1968,49; 1969,1-14u.18-40u.42u.44-48u.50-52; 1971,8u.21-22; 1972,6; 1973,21u.33u.37u.42-43u.47u.49; 1974,1-3u.5-14u.16u.18-24u.27u.31-33u.37-40u.42u.52; 1975,2-4u.6-13u.16-18u.20-46u.48-53; 1976,1-7u.9-20u.22u.24u.26-27u.29-52; 1977,1-6u.8-20u.22-23u.25-28u.30-45