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International Encyclopedia of Geography: People, the Earth, Environment and Technology. Richardson, D., Castree, N., Goodchild, M. F., Kobayashi, A., Liu, W. & Marston, R. A. (gol.).
John Wiley & Sons,
10 t.Allbwn ymchwil: Pennod mewn Llyfr/Adroddiad/Trafodion Cynhadledd › Pennod