<i>E. Ducretet: La Télégraphie hertzienne sans fil aux grandes distances. E. Ducretet constructeur 75, rue Claude-Bernard, Paris 1901</i>. Catalogue's cover of the company with a picture of the antenna built on the roof of the building.
Unknown Publisher [Ducretet ?]
<a rel="nofollow" class="external text" href="http://f4dan.free.fr/paris_radio.html">Paris-Radio</a>, scan image