| Purves, William Kirkwood; Sadava, David; Orians, Gordon H | Cambridge, England, UK: Cambridge University Press |
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| Late Proterozoic low-latitude global glaciation: the Snowball Earth | "Clergy views on evolution, creationism, science, and religion" |
International Earth Rotation and Reference Systems Service IERS.
| "Chimborazo and the old kilogram" | "Continental crustal growth and the supercontinental cycle: evidence from the Central Asian Orogenic Belt" |
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| Life, the Science of Biology: The Science of Biology | Rogers, John James William 2004 |
International Earth Rotation and Reference Systems Service IERS.