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Barbante, Carol; Fischer, Hubertus; Masson-Delmotte, Valerie; Stocker, Thomas; Waelbroeck, Claire; Wolff, Eric (2009). Toward a better understanding of climate of the past million years. Eos, Transactions American Geophysical Union, 90(7), p. 55. Roma: American Geophysical Union 10.1029/2009EO070003
