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Filtering by: Funding statement This study was made possible in part by NSF-EAR-0929638, NSF-EAR-1128999, NSF-BCS-0720025/070028, and the United States National Park Service grant J8R07090002. Remove constraint Funding statement: This study was made possible in part by NSF-EAR-0929638, NSF-EAR-1128999, NSF-BCS-0720025/070028, and the United States National Park Service grant J8R07090002. Decade 1940-1949 Remove constraint Decade: 1940-1949

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