Staub, B. R. (1966). Some variations in fruit, seed and seedling characteristics in the American elm, Ulmus Americana L., in relation to geography of seed source.
Citace podle Chicago (17th ed.)Staub, Brother Robert. Some Variations in Fruit, Seed and Seedling Characteristics in the American Elm, Ulmus Americana L., in Relation to Geography of Seed Source. 1966.
Citace podle MLA (8th ed.)Staub, Brother Robert. Some Variations in Fruit, Seed and Seedling Characteristics in the American Elm, Ulmus Americana L., in Relation to Geography of Seed Source. 1966.
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