Cyclical browning in a subtropical lake inferred from diatom records by Meredith A. Emery Boeck, Evelyn E. Gaiser, Hilary M. Swain, Mark Brenner, Mark Brenner, Jason H. Curtis, William F. Kenney

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Preclassic environmental degradation of Lake Petén Itzá, Guatemala, by the early Maya of Nixtun-Ch’ich’ by Brooke A. Birkett, Jonathan Obrist-Farner, Prudence M. Rice, Wesley G. Parker, Peter M. J. Douglas, Melissa A. Berke, Audrey K. Taylor, Jason H. Curtis, Benjamin Keenan

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