[History & Science] Castro, Fidel. (b. 1926) Signed "Sistema Nacional de Educacion" DiplomaDS, signed Fidel Castro in black felt tip, one page, 13 x 15. 5, 8 September, 1980. A poster style diploma certificate issued to Waldo Oliva Brunet in recognition of his participation in the preparation of teaching materials for the "Sistema Nacional de Educacion." Brunet was co author of "Historia de Cuba," published in 1977. In very good condition, with light scattered soiling, a central horizontal fold and a few small edge creases. A good signed