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A practical treatise on mine engineering (1855)
Greenwell, G.C · Lambert · leaf 276
HU P 3L if of COAL or IRONSTONE WORKING by of COAL OR IRONSTONE WORKING BY iP © § T aim ® ITML . mpsBergbautechnik
e-rara · ETH-Bibliothek · No known copyright restrictions. Free to use for anything.
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