by Institute of International Education (New York, N.Y.)

1921

by Institute of International Education (New York, N.Y.)

1921

by International Correspondence Schools

1900

by International Society of Sugar Cane Technologists. Congress

1930

by Carnegie Endowment for International Peace. Library

1924

by League of Nations. International Committee on Intellectual Co-operation, League of Nations

1926

by International Society of Soil Science

1926

by International Association of Academies

1904

by International society of soil science, Rome

1925

by International Geological Congress

1899

by International Geological Congress, International Geological Congress, XII. Montreal, 1913

1913

by United States Department of State. Office of International Conferences

1946