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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
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(1),
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Why on earth?
Publication:
[Washington, D.C.] : National Geographic Society, 1988
. 96 p. :
, Includes index.
28 cm.
Date:1988
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(1),
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Animal architects.
Publication:
Washington, D.C. : National Geographic Society, 1987
. 104 p. :
, Includes index.
28 cm.
Date:1987
Availability:
Copies available:
(1),
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