DUGiFonsEspecials

1964 Text ​

1966-02 Article ​

1967-03 Article ​

1968 Text ​

1968-09-30 Letter ​

1968-1969 Text ​

1969-01 Text ​

1969-02 Text ​

1972 Text ​

1972-09-30 Book ​

1973 Article ​

1975 Text ​

1975 Article ​

1975-01 Text ​

1975-12 Article ​

1975-1976 Text ​

1976-07 Article ​

1977 Article ​

1977-02 Text ​

1977-09 Text ​

1977-09 Article ​

1977-12 Article ​

1977-12 Article ​

1977-12-12 Letter ​