I hereby certify that
João Carlos Tavares da Silva
has
participated
in
the
XI
Brazilian
Symposium
on
GeoInformatics – GEOINFO’2010, held in Campos do Jordão
– SP, Brazil, November 28 to December 1st, 2010.
Campos do Jordão, December 1st, 2010.
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João Carlos Tavares da Silva