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A question of survival : technology through the ages /
by Walker, Colin,
Publication:
Richmond Hill, Ont. : Scholastic Canada, 1993
. 24 p. :
, Includes index.
26 cm.
Date:1993
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(1),
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The big book of how, when, why? /
Publication:
England : Brown Watson, 2005
. 192 p. :
, Includes index.
31 cm.
Date:2005
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(1),
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