Besides "Jane's All the World's Aircraft" and Prof. Zahm (US Library of Congress), many other leading historians and officials have supported Whitehead's claim. Some of them are listed here (below):
1. Prof. John B. Crane (Harvard University)
2. Jack Carpenter (Biographer of the aviators Curtiss and Waterman)
3. Prof. G.K. Weissenborn, St. Michael's College, Univ. of Toronto, Canada
4. Ron Howland, University of London, Institute of Historical Research
5. David Walker, Head Govt. Accountability Office, US Comptroller General
6. Bruno Wiesler, Head of Degree Program, Joanneum University, Graz, Austria
1. Dr. (later Prof.) John B. Crane (Harvard) to Louise Whitehead (Gustave Whitehead's widow)
1937-01-18, Binghamton Press, p.21
Evening Post, May 15, 1937, p.8, Wellington, New Zealand
1937-01-18, Stratford Star
2. US Historian, Jack Carpenter
Carpenter to Opdycke, June 14, 1989
3. Prof. George K. Weissenborn
University of Toronto, St. Michael's College
4. Ron Howland, University of London
School of Advanced Study, Institute of Historical Research
The Institute of Historical Research is a School of Advanced Study at the University of London. Its function, in part, is to lay down the "best practice" methods and procedures historians use to investigate issues of fact. Ron Howland's assessment (below) therefore carries additional weight.
5. David Walker
Head, US Government Accountability Office
Comptroller General of the United States of America