Não informado. (1912). Inventory of seeds and plants imported. Bureau of Plant Industry, Soils and Agricultural Engineering.
Chicago-referens (17:e uppl.)Não informado. Inventory of Seeds and Plants Imported. Washington: Bureau of Plant Industry, Soils and Agricultural Engineering, 1912.
MLA-referens (8:e uppl.)Não informado. Inventory of Seeds and Plants Imported. Bureau of Plant Industry, Soils and Agricultural Engineering, 1912.
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