polar motion: References & Edit History
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Article History
| Type | Description | Contributor | Date |
|---|---|---|---|
| Invalidated site: International Earth rotation and Reference systems Service - Polar motion. | Jan 21, 2018 | ||
| Added new Web site: Natural Resources Canada - Canadian Spatial Reference System - VLBI - Polar Motion. | May 02, 2008 | ||
| Added new Web site: International Earth rotation and Reference systems Service - Polar motion. | May 02, 2008 | ||
| Article added to new online database. | Jul 20, 1998 |
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