http://dewey.info/scheme/edition/e23/ en
942.04 Period of Houses of Lancaster and York, 1399-1485
942.041 Reign of Henry IV, 1399-1413
http://dewey.info/scheme/edition/e22/ de
942.04 Zeit der Häuser Lancaster und York, 1399–1485
942.041 Regierungszeit von Heinrich IV., 1399–1413
Dewey Decimal Classification
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