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An Unidentified US Space Station Design from the late 60s/early 70s.http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19710002227_1971002227.pdf
An Unidentified US Space Station Design from the late 60s/early 70s.
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19710002227_1971002227.pdf
