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Aug. 21, 2018
August 2018 Puzzle Periodical - Crop Calculations
NSA Puzzle Periodical for August 2018: Crop Calculations
Aug. 17, 2016
August Puzzle Periodical - $50 for All
Can you figure out the correct answer for the August Puzzle Periodical?
Aug. 18, 2015
August 2015 Puzzle Periodical
August 2015 Puzzle Periodical; Puzzle created by Roger B., Cryptanalytic Mathematician, NSA