by Federal Experiment Station in Puerto Rico

1930

by University of Puerto Rico (Río Piedras Campus). Agricultural Experiment Station

1926

by Puerto Rico. Agricultural Experiment Station, Mayaguez

1907

by Puerto Rico Experiment Station

1936

by Puerto Rico. Board of Commissioners of Agriculture

1912

by University of Puerto Rico (Mayagüez Campus). Agricultural Experiment Station

1912

by Puerto Rico. Secretary's, Puerto Rico. Secretary's Office

1903

by University of Puerto Rico (Río Piedras Campus). Agricultural Experiment Station

1917

by University of Puerto Rico (Río Piedras Campus). Agricultural Experiment Station

1917

by Puerto Rico. Governor

1909

by Puerto Rico. Secretary's Office

1926

by Puerto Rico

1923