Billerica Public Library
621.43/56
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http://bibfra.me/vocab/lite/Category
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621.43/56
Code
621.43/56
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5
How it's built, by Elsie Wallace ; illustrated by Rich Watson
Rockets, defying gravity, Anne Drozd, Jerzy Drozd
When the heavens went on sale, the misfits and geniuses who put space within reach, Ashlee Vance
Rocket science, by Deborah Lock
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