tributaries of the Po.

The Graian Alps can also be divided into the following four groups:

* the Mont Blanc group (north of the Little St Bernard Pass), including the Beaufortain Massif
* the Central group (the watershed between the Little St Bernard Pass and the Col du Mont Cenis)
* the Western or French group,
* and the Eastern or Italian group, including the Gran Paradiso Massif.

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