-Existencias: 1982 vol. 1, no. 1-2; 1983 vo. 2, no. 3-8; 1984 vol. 3, no. 9, 11-13;1985 vol.4, no. 14-15; 1986 vol. 5, no.18-19; 1987 vol. 6, no. 20; 1988-1999 no. 21-26, 28-43, 45-49, 51-54, 56--59, 61-62, 64-65, 67, 69-70; 2000-2007 no. 71-75, 77-78, 80, 83, 85, 89, 93, 97, 99-100, 107