Aircraft Company (DAC)
article below gives a comprehensive & detailed description of the evolution
of the Douglas DC-8 Super 70 Series. "DC Flight Approach is prepared
& produced by the Presentations Department of the Douglas Aircraft Company
under the direction of the Flight Test and Operations Group."
It is very informative and I hope you enjoy it.
Article Courtesy of & Many Thanks To Roger "Flash" Gordon & The McDonnell Douglas Aircraft Corporation