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|Material Type:||Government publication, National government publication|
|All Authors / Contributors:||United States. National Aeronautics and Space Administration.|
At head of title: An educational publication of the national Aeronautics and Space Administration, for the middle and secondary-level classroom.
Shipping list no.: 92-0694-P.
|Description:||4 unnumbered pages : illustrations ; 28 cm.|
|Series Title:||NASA educational briefs, EB-109.|