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First Conference February 1962, Second Conference August 1962. For Third Conference, April 1964, see Fed. Proc. 23(6) Part I:1337-1387, 1964. Transcripts available from NINDB, NIH, Bethesda, Maryland for Fourth Conference April, 1965.
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Whiting, M., Spatz, M. & Matsumoto, H. Research progress on cycads. Econ Bot 20, 98–102 (1966). https://doi.org/10.1007/BF02861932
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DOI: https://doi.org/10.1007/BF02861932