Report of Samuel Keefer, civil engineer, to the president and directors of the Niagara Falls Suspension Bridge Company, and to the president and directors of the Clifton Suspension Bridge Company [microform] : Brockville, Ontario, March 1st, 1869
Keefer, Samuel, 1811-1890; Niagara Falls Suspension Bridge Company; Clifton Suspension Bridge Company; McAlpine, William J. (William Jarvis), 1812-1890