en
941 British Isles
941.6 Northern Ireland; Donegal, Monaghan, Cavan counties of Republic of Ireland
941.601 Ulster (Northern Ireland and Ireland)--early history to 1086 941.602 Ulster (Northern Ireland and Ireland)--1086-1171 941.603 Ulster (Northern Ireland and Ireland)--1171-1399 941.604 Ulster (Northern Ireland and Ireland)--1399-1485 941.605 Ulster (Northern Ireland and Ireland)--1485-1603 941.606 Ulster (Northern Ireland and Ireland)--1603-1691 941.607 Ulster (Northern Ireland and Ireland)--1691-1799 941.608 1800-
Dewey Decimal Classification
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