by Puerto Rico. Board of Commissioners of Agriculture

1912

by Puerto Rico. Department of Education

1907

by Puerto Rico. Governor

1922

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

1918

by Puerto Rico. Agricultural Experiment Station, Mayaguez

1911

by Puerto Rico. Office of the Auditor

1910

by Puerto Rico

1911

by Puerto Rico

1913

by Puerto Rico. Agricultural Experiment Station

1901

by Puerto Rico. Federal experiment station, Mayaguez

1901

by Puerto Rico. Mayaguez. Agricultural Experiment Station

1907

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

1920