http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Bulletin (Insular Experiment Station (Río Piedras, San Juan, P.R.))
Government of Porto Rico, Department of Agriculture and Labor, Insular Experiment Station.
Bulletin (Puerto Rico. Board of Commissioners of Agriculture. Experiment Station)
University of Puerto Rico (Río Piedras Campus). Agricultural Experiment Station.