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O.C. History Roundup: Glenn L. Martin - Blogger
Glenn L. Martin - Wikipedia
Aviation Biographies - American Aviation Historical Society
Seemingly Fearless Aviation Pioneer Was a Mama’s Boy at Heart
Glenn Luther Martin (1886-1955) | WikiTree FREE Family Tree
Glenn Luther Martin (1886–1955) - FamilySearch.org
The Martin Company: The US's Forgotten Airliner Manufacturer
Glenn L. Martin | Aviator, Engineer, Entrepreneur | Britannica
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GLENN LUTHER MARTIN