<a href="https://en.wikipedia.org/wiki/Denis_Hayes" class="extiw" title="w:Denis Hayes">Denis Hayes</a>, while director of the Solar Energy Research Institute (1979-1981).
Warren Gretz
circa 1980 <div style="display: none;">date QS:P,+1980-00-00T00:00:00Z/9,P1480,Q5727902</div>
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