Não informado. (1912). Inventory of seeds and plants imported. Bureau of Plant Industry, Soils and Agricultural Engineering.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Inventory of Seeds and Plants Imported. Washington: Bureau of Plant Industry, Soils and Agricultural Engineering, 1912.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Inventory of Seeds and Plants Imported. Bureau of Plant Industry, Soils and Agricultural Engineering, 1912.
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