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Collins Bartholomew Ltd.
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Shapefile
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Princeton
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2009
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1. Global 2G mobile coverage, 2009
2009. Collins Bartholomew Ltd. Representation of the area covered by GSM (2G) mobile communications around the world as of first quarter 2009.
2. Global 3G mobile coverage, 2009
2009. Collins Bartholomew Ltd. Representation of the area covered by 3G mobile communications around the world as of first quarter 2009.