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John H. Wiersema
Dr.
John H. Wiersema
Botany Department
NMNH - MRC 166
Smithsonian Institution
P.O. Box 37012
DC 20013-7012 Washington
USA
Phone: +1 410 570 2908
wiersemaj@si.edu

 


Rules 2020 available online



 
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Latest Issue of Seed Testing International



STI 158 October 2019
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Seedling Evaluation Handbook 4th Edition



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Seed Science and Technology



Volume 47 released
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