Dr. Nikola Tesla: English / Serbo-Croatian Diary Comparisons and Tesla / Scherff Colorado Springs Correspondence by John T. Ratzlaff and Fred A. Jost
Nikola Tesla's Earthquake Machine: With Tesla's Original Patents Plus New Blueprints to Build Your Own Working Model by Dale Pond and Walter Baumgartner
Nikola Tesla - From Colorado to Long Island: Research Notes - Colorado Springs 1899-1900 - New York 1900-1901 by Nikola Tesla
