Não informado. (1934). Journal of Agriculture of the University of Puerto Rico. University of Puerto Rico, Agricultural Experiment Station.
Citace podle Chicago (17th ed.)Não informado. Journal of Agriculture of the University of Puerto Rico. Rio Piedras, Porto Rico: University of Puerto Rico, Agricultural Experiment Station, 1934.
Citace podle MLA (8th ed.)Não informado. Journal of Agriculture of the University of Puerto Rico. University of Puerto Rico, Agricultural Experiment Station, 1934.
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