400 1 _
‡a
Habakkuk, H. J.
‡t
American and British Technology in the 19th Century
400 1 _
‡a
Habakkuk, H. J.
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American and British technology in the 19. century The search for laboursaving inventions
400 1 _
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Habakkuk, H. J.
‡t
American and British technology in the 19th century : the search for laboursaving inventions
400 1 _
‡a
Habakkuk, H. J.
‡t
American and British technology in the nineteenth century
400 1 _
‡a
Habakkuk, H. J.
‡t
American and British technology in the nineteenth century : the search for labour-saving inventions, by H. J. Habakkuk