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| | Reference | On the origin & progress of Brett's submarine and subterranean electric telegraph : with a few brief facts, and the opinions of the press. [s.l.] : [s.n.], [185.?]. ETH-Bibliothek Zürich, Rar 1883, http://doi.org/10.3931/e-rara-14733 / Public Domain Mark |
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On the origin & progress of Brett's submarine and subterranean electric telegrap [37.52 mb]