@article {2078, title = {Climate and the collapse of Mayan civilization}, journal = {Science}, volume = {299}, year = {2003}, note = {id: 556}, month = {2003}, pages = {1731-1735}, author = {Haug, G. H. and Gunther, D. and Peterson, L. C. and Sigman, D. M. and Hughen, K. A.} } @conference {1682, title = {A marine record of Holocene climate events in tropical South America, abstract}, booktitle = {Eos Trans. AGU 83, Fall Meeting Suppl}, year = {2002}, note = {id: 1080}, month = {2002}, address = {San Francisco, CA}, author = {Haug, G. H. and Gunther, D. and Hughen, K. A. and Peterson, L. C. and Rohl, U.} }