by University of Delaware. Division of Agricultural Extension

1915

by University of Delaware

1906

by University of Delaware

1929

by University of Delaware. College of Agricultural Sciences

1889

by A. C. Whittier, Arthur Elliott Grantham, Charles A. McCue, Jacob Joseph Taubenhaus, John Asbury Elliott, Thomas Franklin Manns, University of Delaware. Agricultural Experiment Station, Joseph M. Goheen

1915

by Delaware. General Assembly. House of Representatives

1917

by University of Delaware. Agricultural Experiment Station

1889

by Delaware. State Board of Agriculture

1911

by Delaware. State Auditor's Department

1921

by Delaware. State Auditor's Department

1923

by Delaware

1913

by Delaware. State Auditor's Dept

1923