The 1975 “Manned orbital systems concept study” looked at extended duration Spacelab derived mini space stations, capable of being expanded into greater capability. The artwork reproduced below is quite nice, but is sadly of rather miserable resolution. originally posted online by NASA, it was saved by the Internet Archive; it’s not clear if the Archive saved the best resolution version, or if they flubbed it and saved a low-rez version. Sadly, only Book 4 of the study is currently available online.
https://archive.org/details/MSFC-9144456
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