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Electricity /
by Riley, Peter D.
Publication:
New York : Franklin Watts, 1998
. 32 p. :
, Includes index.
28 cm.
Date:1998
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The earth in space /
by Riley, Peter D.
Publication:
New York : Franklin Watts, 1999
. 32 p. :
, Includes index.
28 cm.
Date:1999
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Light and color /
by Riley, Peter D.
Publication:
New York : F. Watts, 1999
. 32 p. :
, Includes index.
28 cm.
Date:1999
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