by United States. Department of the Interior

1889

by United States. Agricultural Research Service

1909

by United States. Department of the Interior

1872

by United States. Office of Experiment Stations

1908

by United States. Office of Education

1902

by United States. Bureau of Education

1906

by United States. Department of Agriculture. Office of Publications

1898

by United States. Office of Experiment Stations

1899

by United States. Office of Education

1900

by United States. Department of the Interior

1901

by United States. Department of Agriculture. Division of Publications

1902

by United States. Industrial Commission

1901