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[29] Steffen, K., P. U. Clark, J. G. Cogley, D. Holland, S. Marshall, E. Rignot, and R. H. Thomas. "Rapid Changes in Glaciers and Ice Sheets and Their Impacts on Sea Level." In Abrupt Climate Change, 60-142. Vol. Synthesis and Assessment Product 3.4. Reston, VA: U.S. Geological Survey, 2008.
[40] Lemke, P., J. Ren, R. B. Alley, I. Allison, J. Carrasco, G. Flato, Y. Fujii, G. Kaser, P. Mote, R. H. Thomas et al. "Observations: Changes in Snow, Ice, and Frozen Ground." In Climate Change 2007: The Physical Basis - Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, edited by S. Solomon, D. Qin, M. Manning, Z. Chen, M. Marquis, K. B. Averyt, M. Tignor and H. L. Miller, 337-383. Cambridge University Press, 2007.