by Survey of Federal Archives (U.S.)

1942

by U.S.- Bureau of plant industry. Office of cereal investigations

1924

by National Association of Retail Druggists (U.S.)

1911

by National Archives (U.S.)

1948

by U.S. Agricultural Experiment Station for Dakota

1890

by U.S. House of Representatives

1918

by National Academy of Sciences (U.S.)

1926 · National Academies

by U.S. Congress

1918

by U.S. . AGRICULTURE, DEPT. OF

1919

by National Academy of Sciences (U.S.)

1927

by National Academy of Sciences (U.S.)

1922

by National Academy of Sciences (U.S.)

1923