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We will also tag and release the corresponding versions at this repository for the sake of completeness.\n\n## User Manuals\n\nEach implementation of GEOS-Chem has its own manual page.  For more information, please see:\n\n* __GEOS-Chem \"Classic\":__ [https://geos-chem.readthedocs.io](https://geos-chem.readthedocs.io)\n\n* __GCHP:__ [https://gchp.readthedocs.io](https://gchp.readthedocs.io)\n\n* __WRF-GC:__ [http://wrf.geos-chem.org](http:/wrf.geos-chem.org)\n\n* __Other documentation:__ [View related documentation @ Read TheDocs](https://geos-chem.readthedocs.io/en/latest/geos-chem-shared-docs/supplemental-guides/related-docs.html)\n\n## About GEOS-Chem\n\nGEOS-Chem is a global 3-D model of atmospheric chemistry driven by meteorological input from the Goddard Earth Observing System (GEOS) of the [NASA Global Modeling and Assimilation Office](http://gmao.gsfc.nasa.gov/). 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