21 cm Kanone 38

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 cm Kanone 38”, English Wikipedia, consulted as further reading

   reference work · Reputable secondary · Wikipedia

   Consult the source
2. 2.

   Wikidata, structured authority record Q212910: 21 cm Kanone 38

   reference work · Reputable secondary · Wikidata

   Consult the source

6,095 published records in this field, each with its sources named.

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