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판 7개, 최신 판부터
BiblioBazaar, 2007, 무선(페이퍼백), ISBN 9781434615398
Hard Press, 2006, 무선(페이퍼백), ISBN 9781406944198
Kessinger Publishing, 2003, 무선(페이퍼백), ISBN 9780766130760
Scientists of New Atlantis, 2001, Unknown Binding, ISBN 9781571791375
University of California Press, 1993, ISBN 9780520075153
Oxford University Press, 1974, ISBN 9780192500625
University of Nebraska Press, 1966, ISBN 9780803250307