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Geek Trivia: The Pencil Grading Scale (Which Labels Pencils #1-4) Was Invented By?

January 17, 2017 Geek, How To

The Pencil Grading Scale (Which Labels Pencils #1-4) Was Invented By?

Benjamin Franklin
Henry David Thoreau
Mark Twain
Andrew Johnson

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by Jason Fitzpatrick via How-To Geek

Geek Trivia: The Pencil Grading Scale (Which Labels Pencils #1-4) Was Invented By?

Geek Trivia: The Pencil Grading Scale (Which Labels Pencils #1-4) Was Invented By?

Reviewed by Ossama Hashim on January 17, 2017 Rating: 5

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