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common-cents.info
Hanneman, William. "The Common Cents System". common-cents.info. RodMaker Magazine. Archived from the original on 9 February 2018. Retrieved 9 February 2018.
Hanneman, William. "The Common Cents System". common-cents.info. RodMaker Magazine. Archived from the original on 9 February 2018. Retrieved 9 February 2018.