„Niturbinding“: Munur á milli breytinga
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:''[[Cercocarpus]]''
:''[[Chamaebatia]]''
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== Heimildir ==
*
|sted=København|udgiver=Munksgaard|år=1992|id=ISBN 87-16-10775-6}}
* [http://helios.bto.ed.ac.uk/bto/microbes/nitrogen.htm The Microbial World: The Nitrogen cycle and Nitrogen fixation] {{Webarchive|url=https://web.archive.org/web/20060925064851/http://helios.bto.ed.ac.uk/bto/microbes/nitrogen.htm |date=2006-09-25 }}
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