"Unit of Area"^^ . "C0439478"^^ . "Unit of AreaHDNCI" . "Unit of Area"^^ . "Unit_of_Area"^^ . . "Header_Concept"^^ . "An indication of the type of unit of measure being used to express an area.NCI" . "Area UnitSYNCI" . "Quantitative Concept"^^ . "C48037"^^ . .