Celestial Research CorporationA feasibility study of the cryopumped tube train concept, prepared for the Office of High Speed Ground Transportation, Contract C-279–66, Oct 1966.
2.
Rensselaer Polytechnic InstituteProject tubeflight-feasibility study, prepared for the Office of High Speed Ground Transportation, Contract C-117–66, Sept 1966.
3.
Massachusetts Institute of Technology Reports on research tasks, prepared for the Office of High Speed Ground Transportation, Contract C85–65, Sept. 1966.
4.
Carnegie Institute of TechnologyStudy of new track structure designs, proposal to the Office of High Speed Ground Transportation.
