Ralph, J. (1893). Harper's Chicago and the World's fair: The chapters on the exposition being collated from official sources and approved by the Department of publicity and promotion of the World's Columbian exposition. New York: Harper and brothers.

Ralph, Julian. Harper's Chicago and the World's Fair: The Chapters On the Exposition Being Collated From Official Sources and Approved By the Department of Publicity and Promotion of the World's Columbian Exposition. New York: Harper and brothers, 1893.

Ralph, Julian. Harper's Chicago and the World's Fair: The Chapters On the Exposition Being Collated From Official Sources and Approved By the Department of Publicity and Promotion of the World's Columbian Exposition. New York: Harper and brothers, 1893.