Hildenbrand, Wilhelm The Underground Haulage of Coal by Wire Ropes: Including the System of Wire Rope Tramways As a Means of Transportation for Mining Products : A Practical Essay Written for John A. Roebling's Sons Co

Roebling, John Augustus 1806-1869 Report on the Condition of the Niagara Railway Suspension Bridge

Hildenbrand, Wilhelm The Underground Haulage of Coal by Wire Ropes: Including the System of Wire Rope Tramways As a Means of Transportation for Mining Products : A Practical Essay Written for John A. Roebling's Sons Co

Harrod, Kathryn E Master Bridge Builders The Story Of The Roeblings

Roebling, Washington Augustus Pneumatic Tower Foundations of the East River Suspension Bridge