Pittsburgh Exposition Society. (1880). Third annual report of the Board of Managers of the Pittsburgh Exposition Society, Pittsburgh, January 6, 1880. Printed by Nevin Bros..
Citace podle Chicago (17th ed.)Pittsburgh Exposition Society. Third Annual Report of the Board of Managers of the Pittsburgh Exposition Society, Pittsburgh, January 6, 1880. Pittsburgh: Printed by Nevin Bros., 1880.
Citace podle MLA (8th ed.)Pittsburgh Exposition Society. Third Annual Report of the Board of Managers of the Pittsburgh Exposition Society, Pittsburgh, January 6, 1880. Printed by Nevin Bros., 1880.
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