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Supported by funds from the State of Washington Initiative No. 171 and by the National Science Foundation, Grant G-1323.
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Kruckeberg, A.R. Artificial crosses of western North American Silenes. Brittonia 13, 305–333 (1961). https://doi.org/10.2307/2805410
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DOI: https://doi.org/10.2307/2805410