Items
Relation is exactly
Callender's Bitumen Telegraph and Waterproof
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[D8420V], Publication, Callender Insulating and Waterproofing Co, W M Callender, June 24th, 1884 1884-06-24 -
[D8736AEO], Letter from John William Lieb, Societa Generale Italiana di Elettricita to Edison Machine Works, November 16th, 1887 1887-11-16