Walter Korff was also the author of the two 1966 publications that I listed. He did some very insightful work. Korff also wrote the SAE paper, "The Body Engineer's Role in Automobile Aerodynamics", presented in 1963. I understood that it was that paper that made the Summers work possible.
Although I have not read his book, I am sure that he must cite his SAE works as well.
Throughout history in the US, there have been many gearheads that have done things in aerospace and automobile technology at the same time. Korff was certainly one of those.
Regards,
HB2