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200 1 $aAmerican and British technology in the nineteenth century$ethe search for labour-saving inventions$fby H. J. Habakkuk
210   $aCambridge$cUniversity press$d1967
215   $a222 p.$d20 cm.
225 2 $aHistory economics$iCAM$v447
410  0$12001$aHistory economics$iCAM$v447
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461  1$1001-------$12001
606 0 $aTecnologia$yGran Bretagna$zSec. 19.
606 0 $aTecnologia$yStati Uniti d'AMerica$zSec. 19.
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996   $aAmerican and british technology in the nineteenth century$9486939
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