-Existencias: 1964 v. 1, no. 1-11; 1965 v. 2, no. 1-3; 1966 v. 3, no. 2-3; 1967 v. 4, no. 1-2; 1968 v. 5, no. 1-5; 1969 v. 6, no. 1-6; 1970 v. 7, no. 1-3; 1971 - 1972 v. 8-9, no. 1-5; 1973 v. 10, no. 1-7; 1974 v. 11, no. 1-2; 1975 v. 12, no. 1-3; 1976-1979 v. 13-14, no. 1-3