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A comment on Finding the 'invisible' millions who are not on maps. Parent comment

Re:Finding the 'invisible' millions who are not on maps by new2628 on Friday July 03, 2020 @01:16PM (#23725698)
I think I read about it here first: https://www.ribbonfarm.com/2010/07/26/a-big-little-idea-call...

There are further links in the post.

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