ドナルド・ウィルズ・ダグラス・シニア
Building Victory: Aircraft Manufacturing in the Los Angeles Area in World War II, pp. 13–16, Cypress, CA, 2013.
↑ Parker, Dana T. Building Victory: Aircraft Manufacturing in the Los Angeles Area in World War II, pp. 7–8, 13, 16, Cypress, CA, 2013. ISBN 978-0-9897906-0-4.
↑ Parker, Dana T. Building Victory: Aircraft Manufacturing in the Los Angeles Area in World War II, pp. 5, 7–8, Cypress, CA, 2013. ISBN 978-0-9897906-0-4.
1 2 “Executive Biography of Donald W. Douglas Sr.”. Boeing. 2017年12月26日閲覧。
↑ “Donald Douglas”. PBS. 2013年12月26日閲覧。
↑ Herman, Arthur. Freedom's Forge: How American Business Produced Victory in World War II, pp.