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	1.	Seti Institute; Foreword-Carl Sagan  How Might Life Evolve on Other Worlds?: Seti Academy Planet Project Teacher Ideas Press 1995 Very Good Soft Cover Very good copy with minor shelfwear. Price: 7.95 USD
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	2.	Seti Institute; Foreword-Carl Sagan  The Evolution of a Planetary System Teacher Ideas Press 1995 Very Good Soft Cover Tight clean copy with minor shelfwear. Price: 30.00 USD
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