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Horn, Kennedy
From the text... 'Because maize is a plant that requires human cultivation for survival, we can infer from the distribution of maize pollen that sedentary agriculturalists were present at La Selva by 2700 B.P. This interpretation is consistent with…
Type: Document
Year: 2001
Fritts
[Description from Elsevier website] Tree Rings and Climate deals with the principles of dendrochronology, with emphasis on tree-ring studies involving climate-related problems. This book looks at the spatial and temporal variations in tree-ring…
Type: Document
Year: 1976