Description: Blad ECN
| Magazine | Date | Articles |
|---|---|---|
| Energie Spectrum | January 1980 | 4 |
| Energie Spectrum | February 1980 | 4 |
| Energie Spectrum | March 1980 | 7 |
| Energie Spectrum | April 1980 | 2 |
| Energie Spectrum | May 1980 | 2 |
| Energie Spectrum | July 1980 | 1 |
| Energie Spectrum | September 1980 | 2 |
| Energie Spectrum | October 1980 | 3 |
| Energie Spectrum | November 1980 | 4 |
| Energie Spectrum | December 1980 | 3 |
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(sorted display)