Description: Blad ECN
| Magazine | Date | Articles |
|---|---|---|
| Energie Spectrum | January 1978 | 9 |
| Energie Spectrum | July 1978 | 8 |
| Energie Spectrum | September 1978 | 16 |
| Energie Spectrum | October 1978 | 11 |
| Energie Spectrum | November 1978 | 6 |
| Energie Spectrum | December 1978 | 11 |
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