July 10th, 1931
New York City July 10, 1931 Dear Mr. Tesla: One of the most startling contributions to progress that...
Nikola Tesla Letters
Letters to and from, or regarding Nikola Tesla
June 8th, 1931
HARVARD UNIVERSITY THE HARVARD ENGINEERING SCHOOL Comfort A. Adams Pierce Hall Cambridge,...
June 4th, 1931
Westinghouse Electric & Manufacturing Company East Pittsburgh, Pa. Office of W.K. Dunlap Acting Vice...