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Experimenting with air and flight /
by Walker, Ormiston H.
Publication:
New York : F. Watts, 1989
. 96 p. :
, Includes index.
24 cm.
Date:1989
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(1),
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Experimenting with electricity and magnetism /
by Wong, Ovid K.
Publication:
New York ; Toronto : F. Watts, 1993
. 128 p. :
24 cm.
Date:1993
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Experimenting with time /
by Gardner, Robert,
Publication:
New York : Franklin Watts, 1995
. 160 p. :
24 cm.
Date:1995
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(2),
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Experimenting with water /
by Gardner, Robert,
Publication:
New York : F. Watts, 1993
. 144 p. :
24 cm.
Date:1993
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(1),
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