Post, R. C. (1976). A treatise upon selected aspects of the Great International Exhibition held in Philadelphia on the occasion of our Nation's one-hundredth birthday, with some reference to another exhibition held in Washington commemorating that epic event, and called 1876, a Centennial Exhibition. Washington: National Museum of History and Technology, Smithsonian Institution.

Post, Robert C. A Treatise Upon Selected Aspects of the Great International Exhibition Held in Philadelphia On the Occasion of Our Nation's One-hundredth Birthday, With Some Reference to Another Exhibition Held in Washington Commemorating That Epic Event, and Called 1876, a Centennial Exhibition. Washington: National Museum of History and Technology, Smithsonian Institution, 1976.

Post, Robert C. A Treatise Upon Selected Aspects of the Great International Exhibition Held in Philadelphia On the Occasion of Our Nation's One-hundredth Birthday, With Some Reference to Another Exhibition Held in Washington Commemorating That Epic Event, and Called 1876, a Centennial Exhibition. Washington: National Museum of History and Technology, Smithsonian Institution, 1976.