|Cutaway of ROOST booster in Earth orbit prior to payload separation. See next image for explanation. Image credit: Robert S. Wallace/Douglas Aircraft Company via San Diego Air & Space Museum.|
|Cutaway painting of ROOST booster with Earth-return payload and fully deployed inflatable drag cone at start of reentry. See next illustration for explanation. Image credit: Robert S. Wallace/Douglas Aircraft Company via San Diego Air & Space Museum.|
An Integrated Systems Study for a Reusable One-Stage Orbital Space Truck (ROOST), P. Bono, F. Bergonz, and J. Hayes, Douglas Report SM-42597, Douglas Aircraft Company, Inc., Missile & Space Systems Division, December 1962.
"ROMBUS — An Integrated Systems Concept for a Reusable Orbital Module (Booster and Utility Shuttle)," Paper No. 63-271, P. Bono; paper presented at the American Institute of Aeronautics and Astronautics Summer Meeting in Los Angeles, California, 17-20 June 1963.
"Philip Bono, Reusable Rocket Booster's Designer, Dies at 72," G. Hernandez, Los Angeles Times, 27 May 1993 (https://www.latimes.com/archives/la-xpm-1993-05-27-me-40243-story.html — accessed 18 August 2022).
San Diego Air & Space Museum Image Collection (https://sandiegoairandspace.org/collection/image-collection — accessed 10 August 2022).