Revista mensual Monthly review - New York - 1963 (1) ; 1964 (12) ; 1969 (60) ; 1970 (72) ; 1979 v. 2 (8, 12) v. 3 (1, 5) ; 1980 v. 3 (6-7, 11-12) v. 4 (1-3) ; 1981 v.4 (4-5 , 6/7)


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