Cloud Nine (sphere) (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Cloud Nine (sphere)" in English language version.

refsWebsite

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2books.google.com

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archive.org

Vinicoff, Eric (1988). Maiden Flight. New York: Baen Books. p. 405. ISBN 0671697951.

books.google.com

Baldwin, J (1997). BuckyWorks: Buckminster Fuller's ideas for today. John Wiley and Sons. p. 190. ISBN 978-0-471-19812-3.
Sieden, Lloyd Steven (2000). Buckminster Fuller's universe. Basic Books. p. 409. ISBN 978-0-7382-0379-9.