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نمایش تعداد 21-30 از 240

0469 Nitrogen cycling (1)
0470 Nutrients and nutrient cycling (1)
0493 Urban systems (1)
0496 Water quality (1)
0550 Model verification and validation (1)
0702 Permafrost (2)
0704 Seasonally frozen ground (4)
0706 Active layer (1)
0710 Periglacial processes (1)
0720 Glaciers (1)