K – USA Meaning of colours: red = not informed violet = informed, but no response green = informed, English (en) or German (ge) questionnaire/s returned (from pilots/ from controllers)
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K |
Mainland United States of America (17en/1en) |
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Each yellow spot in the following map(s) stands for a place from which this page has been looked at between 1 September and 31 December 2007:
