by United States. Superintendent of Documents

1927

by United States. Congress. Senate. Committee on Agriculture and Forestry

1929

by United States. Federal Board for Vocational Education

1919

by United States. Congress. Senate. Committee on Appropriations

1930

by United States. Children's Bureau

1919

by United States. Congress. House. Committee on Agriculture

1924

by United States. Congress. Senate. Committee on Appropriations

1922

by United States. Bureau of Public Roads. Division of Agricultural Engineering

1926

by United States. Department of Agriculture

1919

by United States. Office of Experiment Stations

1913

by United States. Department of Agriculture

1928

by United States. Congress. Senate. Committee on Agriculture and Forestry

1916