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12by Carlson, C.R., Helliwell, R.A., Carpenter, D.L.Get access
Published in Journal of Geophysical Research (1985)
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19by Soulsbya, C., Helliwell, R.C., Ferrier, R.C., Jenkins, A., Harriman, R.Get access
Published in Journal of Hydrology (1997)
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20by Fraser-Smith, A. C., Helliwell, R. A., Lanzerotti, L. J., Rosenberg, T. J.Get access
Published in Science (1992)
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Article in Journal/Newspaper