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How things work.
Publication:
[Washington, D.C.] : National Geographic Society, 1983
. 104 p. :
, Accompanied by "Classroom activities folder" containing work sheets, etc. | Includes index.
28 cm.
Date:1983
Availability:
Copies available:
(1),
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Fun with physics /
by McGrath, Susan,
Publication:
Washington, D.C. : National Geographic Society, 1986
. 104 p. :
, One folded poster/game in pocket. | Includes index.
28 cm.
Date:1986
Availability:
Copies available:
(1),
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