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One, two, three, and many;: A first look at numbers
Solveig Paulson Russell
Hardcover (H. Z. Walck, March 15, 1970)None
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Lights for the night: A first look at illumination
Solveig Paulson Russell
Hardcover (H. Z. Walck, March 15, 1970)Traces the development of man's use of light from the torches of the caveman to atomically produced electricity.