Various versions of the documents describing GRIB are available                                          |
in this directory.  The most current version we have available                                            |
will reside directly in this directory and previous versions                                             |
will reside in the prev-vers subdirectory.                                                                  |
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The official WMO description is available in WMO Manual on                                               |
Codes No. 306, Vol 1, Part B or online at -
http://www.wmo.ch/web/www/reports/Guide-binary-2.html#Section1 .