Immagine principale
United States Department of Energy
Informazioni aggiuntive
Immagine caricata da jcbrunner in Sep 8, 2006.
Copyright: This image is a work of a United States Department of Energy (or predecessor organization) employee, taken or made during the course of an employee's official duties. As a work of the U.S. federal government, the image is in the public domain. Wikipedia: