| web | https://insideclimatenews.org/news/01052019/drought-climate-change-fingerprints-global-warming-20th-century-tree-rings-marvel-cook |
| author | Bob Berwyn |
| publication | Inside Climate News |
| date | 2019-05-01 |
| web | Kate Marvel, Benjamin I. Cook | Nature | 2019-05-01 |
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