Johnston, Gordon Thomas
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| Organisation | From | Until | Service years |
||
|---|---|---|---|---|---|
| 1 | INTERNATIONAL FEDERATION OF HYDROGRAPHIC SOCIETIES | 1995-11-06 | - | ||
| 2022-11-25 | 3.24 | ||||
| 2 | THE HYDROGRAPHIC SOCIETY UK | 2021-10-05 | 4.38 | ||
| 3 | VENTURE GEOMATICS LIMITED | 2006-04-05 | 19.88 |
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