Pt. 1, v. 1. The literature for 1940-1951 -- v. 2. The literature for 1952-1959 -- v. 3. The literature for 1960-1965 -- v. 4. The literature for 1966-1969 -- v. 5. The subject listings for 1940-1969 -- Pt. 2, v. 1. The literature for 1970-1975 -- v. 2. The subject listings for 1970-1975