اردو کى بورڈ
Smiles, Samuel,

Lives of Boulton and Watt : principally from the original Soho mss. Comprising also a history of the invention and introduction of the steam engine / Samuel Smiles, - London : John Murray, 1865. - 521 p.


Watt, James, 1736-1819,
Boulton, Matthew, 1728-1809,
Steam-engines,

621.10924 S641L 1865

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