.21 Sharp

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Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.

1. 1.

   “.21 Sharp”, English Wikipedia, consulted as further reading

   reference work · Reputable secondary · Wikipedia

   Consult the source
2. 2.

   Wikidata, structured authority record Q136469308: .21 Sharp

   reference work · Reputable secondary · Wikidata

   Consult the source

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