Não informado. (1909). Bulletin of the Department of Agriculture, Trinidad and Tobago. Trinidad and Tobago Department of Agriculture.
Chicago-referens (17:e uppl.)Não informado. Bulletin of the Department of Agriculture, Trinidad and Tobago. Port of Spain: Trinidad and Tobago Department of Agriculture, 1909.
MLA-referens (8:e uppl.)Não informado. Bulletin of the Department of Agriculture, Trinidad and Tobago. Trinidad and Tobago Department of Agriculture, 1909.
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