1. Agricultural Experiment Station, College of Agriculture and Mechanic Arts, University of Puerto Rico (1935a), Annual Report of the Director for the Year 1933–34, San Juan, Bureau of Supplies, Printing, and Transportation.
2. Agricultural Experiment Station, College of Agriculture and Mechanic Arts, University of Puerto Rico (1937b), Annual Report of the Agricultural Experiment Station. Fiscal Year 1935–36, San Juan, Bureau of Supplies, Printing, and Transportation.
3. Agricultural Experiment Station, College of Agriculture and Mechanic Arts, University of Puerto Rico (1938c), Annual Report of the Agricultural Experiment Station. Fiscal Year 1936–37, San Juan, Bureau of Supplies, Printing, and Transportation.
4. Agricultural Experiment Station, College of Agriculture and Mechanic Arts, University of Puerto Rico (1939d), Annual Report of the Agricultural Experiment Station. Fiscal Year 1937–38, San Juan, Bureau of Supplies, Printing, and Transportation.
5. Agricultural Experiment Station, College of Agriculture and Mechanic Arts, University of Puerto Rico (1939e), Annual Report of the Agricultural Experiment Station. Fiscal Year 1938–39, San Juan, Bureau of Supplies, Printing, and Transportation.