http://dewey.info/scheme/edition/e23/ en
973.334 Operations of 1778
973.3341 Winter at Valley Forge, 1777-1778
http://dewey.info/scheme/edition/e22/ de
973.334 Operationen im Jahr 1778
973.3341 Winter im Valley Forge, 1777–1778
Dewey Decimal Classification
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