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Pulleys and gears /
by Glover, David,
Publication:
Crystal Lake, IL : Rigby Interactive Library, 1997
. 24 p. :
27 cm.
Date:1997
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The pulley /
by Armentrout, Patricia,
Publication:
Vero Beach, Fla. : Rourke Press, 1997
. 24 p. :
, Includes index.
26 cm.
Date:1997
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WORKING MACHINES
by MARSHALL, JOHN
Publication:
THE ROURKE BOOK COMPANY 1995
. HARD COVER ( SERIES ENERGY AND ACTION )
Date:1995
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(1),
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