Niagara Bridge Condition Report - Full text of Roebling's 1860 report prepared for the presidents and directors of the Niagara Falls Suspension and Niagara Falls International Bridge Companies. - http://quod.lib.umich.edu/cgi/t/text/text-idx?c=moa;idno=AJR3285
Roebling, John Augustus - Brief profile from Great Buildings Online. - http://www.greatbuildings.com/architects/John_Augustus_Roebling.html
John A. Roebling Cincinnati Suspension Bridge - History and photographs of Roebling's 1866 span between Cincinnati, Ohio and Covington, Kentucky. - http://www.cincinnati-transit.net/suspension.html
Roebling and the Brooklyn Bridge - Illustrated digitized items from the Library of Congress American Memory historic collections. - http://lcweb2.loc.gov/ammem/today/jun12.html
Long and Short Span Railway Bridges - Facsimile of the book wriiten by Roebling in 1889. Also available in pdf and tiff formats. - http://bridges.lib.lehigh.edu/books/book1831.html
Niagara Falls Suspension Bridge - Full text of Roebling's final report to the Niagara Falls Suspension Bridge Company. Available in text and pdf formats. - http://bridges.lib.lehigh.edu/books/book1811.html
The Roebling Online History Archive - Provides a general and social history of the Roebling Company. Includes essays, biographies, timeline, and a walking tour. - http://www.inventionfactory.com/history/index.html
John Roebling - John and Washington Roebling and the Brooklyn Bridge. Essay by John H. Lienhard. - http://www.uh.edu/engines/epi87.htm