by West Virginia University

1928

by West Virginia

1915

by West Virginia University. Agricultural Experiment Station

1916

by Virginia

1919

by Virginia Agricultural Experiment Station

1892

by Virginia Agricultural Experiment Station

1921

by Virginia. Truck Experiment Station, Norfolk

1909

by Virginia Agricultural Experiment Station

1915

by Virginia. Board of Crop Pest Commissioners

1901

by West Virginia

1915

by West Virginia

1915

by Virginia. State Entomologist and Plant Pathologist

1910