Descrizione delle macchine e procedimenti per cui vennero accordati attestati di privativa ...
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Item Link | Original Source |
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Full view v.1-3 1855-1857 | University of Michigan |
Full view v.4-6 1858-1860 | University of Michigan |
Full view no.13 1861 | University of Michigan |
Full view no.14 1862 | University of Michigan |
Full view no.15 1862 | University of Michigan |