Derek A. Harkness
4 works in English-language magazines
| Date | Page | Type | Title | Magazine |
|---|---|---|---|---|
| December 1976 | 22 | Essay | Letter (Matrix 9) | Matrix, #9 |
| April 1977 | 18 | Essay | Letter (Matrix 11) | Matrix, #11 |
| June 1977 | 27 | Essay | Letter (Matrix 12) | Matrix, #12 |
| October 1977 | 30 | Essay | Letter (Matrix 14) | Matrix, #14 |