Aaron Liston, Loren H. Rieseberg, Robert P. Adams, Nhan Do, Zhu Ge-lin, A Method for Collecting Dried Plant Specimens for DNA and Isozyme Analyses, and the Results of a Field Test in Xinjiang, China, Annals of the Missouri Botanical Garden, Vol. 77, No. 4 (1990), pp. 859-863
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