DUGiFonsEspecials

1964 Text ​

1966-02 Article ​

1967-03 Article ​

1968 Text ​

1968 Text ​

1968-09-30 Letter ​

1969-01 Text ​

1969-02 Text ​

[1970] Text ​

1972 Text ​

1972-09-30 Book ​

1973 Article ​

[1974] Text ​

1975 Text ​

1975 Article ​

1975 Text ​

1975-01 Text ​

1975-12 Article ​

1976-07 Article ​

1977 Article ​

[1977] Text ​

1977-02 Text ​

1977-09 Text ​

1977-09 Article ​