Forests, fields, and the edge of sustainability at the ancient Maya city of Tikal.
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Proc Natl Acad Sci U S A. 2014 Dec 30;111(52):18513-8. doi: 10.1073/pnas.1408631111. Epub 2014 Dec 15.
Proc Natl Acad Sci U S A. 2014.
PMID: 25512500
Free PMC article.