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A chart that printed badly, a colour key that does not match the symbols, a subject you wish existed, or a licensing question. Write here. Reports of a broken file go to the top of the pile, because a chart nobody can count is worse than no chart at all.

If you believe a design on this site infringes your rights, say so here with a link to the page and to your original work. Claims like that are read the same day and acted on quickly, because this site publishes only its own designs and a mistake would be one worth fixing at once.

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