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A comment on What's the Most Concave State in the U.S.? Using R to Solve a Geography Puzzle. Parent comment

Re:What's the Most Concave State in the U.S.? Using R to Sol... by chiph on Wednesday September 25, 2013 @12:41PM (#6445631)
affiliate tag-less:

http://www.amazon.com/How-States-Their-Shapes-ebook/dp/B001N...

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