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NIH 3D
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Official websites use .gov
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Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

NIH3D

Common knapweed (Centaurea nigra) pollen grain

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Centaurea nigra.zip

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Centaurea nigra - Common knapweed.zip

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Supplemental Documentation File

EMS Eng Sci j 2 2017_2.pdf

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