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100 things you should know about planet earth /
by Riley, Peter.
Publication:
Broomall, Pa. : Mason Crest Publishers, 2001
. 48 p. :
, Includes index.
31 cm.
Date:2001
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Magnetism
by Riley, Peter
Publication:
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Electricity
by Riley, Peter
Publication:
Danbury, Conn. : Franklin Watts, 1998
. 32 p. :
, Accompanying material for SCI 6A, unit on Electricity.
27 cm.
Date:1998
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(1),
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