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| First Page | Document Content | |
|---|---|---|
 Date: 2007-03-20 10:33:06European people Dutch people Tycho Brahe Triangulation Astronomical rings Cornelius Gemma Science Gemma Frisius Willebrord Snellius |
| First Page | Document Content | |
|---|---|---|
Date: 2007-03-20 10:33:06European people Dutch people Tycho Brahe Triangulation Astronomical rings Cornelius Gemma Science Gemma Frisius Willebrord Snellius |
