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Make it balance /
by Evans, David,
Publication:
Richmond Hill, Ont. : Scholastic Canada, 1992
. 29 p. :
, Includes index.
25 cm.
Date:1992
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(1),
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Weight and balance /
by Taylor, Barbara,
Publication:
New York : F. Watts, 1990
. 32 p. :
, Includes index.
28 cm.
Date:1990
Availability:
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(1),
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