Internationality and international congresses. Report to the Department of State by Samuel B. Ruggles, delegate of the United States to the International Statistical Congress at The Hague, in 1869, with the accompanying documents, including the report to the congress on the comparative population and cereal product of Europe and the United States
United States. Delegation to the International Statistical Congress (7th : 1869 : Hague, Netherlands); Ruggles, Samuel B. (Samuel Bulkley), 1800-1881