Clark Johnson
![Johnson at the 2009 [[Karlovy Vary International Film Festival]]](https://upload.wikimedia.org/wikipedia/commons/1/1c/Clark_Johnson.jpg)
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21by Singer, Brad, S., Guillou, Herve, Jicha, Brian, R., Laj, Carlo, Kissel, Catherine, Beard, Brian, L., Johnson, Clark, M.Get access
Published in Earth and Planetary Science Letters (2009)
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