Brief review to be added of Carl Sagan's book “Billions and Billions” (1998) (available on Amazon USA and on Amazon UK)
Web Resources
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Book References
For discussion see the following:
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Year |
Discussion by:
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No. of Pages |
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Davidson, Keay in his “Carl Sagan: A Life” (1999) (available on Amazon USA and on Amazon UK) at pages 416-417 (in Chapter 18) of the Wiley softcover edition. |
2 |
Other Material