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• This is the April 21, 1962 issue of "Science News Letter" magazine.  Cover story on Gamma Greenhouse.  Inside articles on various science and technological innovations of the day.  1 page article on astronaut, John Glenn.  A terrific item for the vintage science historian or collector.

• 12 inside pages.  Condition is VG++ (very good ++) or better.  Mail label as shown.  Inside coupon clip (does not interfere with any article. 

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