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SoftwareMaven
on May 30, 2012
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Soviet Moon Lander Discovered Water on The Moon in...
23000 per million, 23 per thousand or one per 4400 (assuming parts are measured by mass)[1]
1.
http://www.madsci.org/posts/archives/aug97/868365319.Es.r.ht...
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1. http://www.madsci.org/posts/archives/aug97/868365319.Es.r.ht...