wolds

n.a tract of open rolling country (especially upland)

The Chalk of the Yorkshire Wolds
The people of the Wolds in English settlement history
The Quaternary deposits of the Yorkshire Wolds [England]
Quarries and wildlife conservation in the Yorkshire Wolds, England
vascular flora of disused chalk pits and quarries in the Yorkshire wolds
Cemeteries and Settlement Patterns of the Iron Age on the Yorkshire Wolds
Cottam: An Anglian and Anglo-Scandinavian settlement on the Yorkshire Wolds
Seed rain dynamics in disused chalk quarries in the Yorkshire Wolds, England, with special reference to nature conservation
The seed bank in soils of disused chalk quarries in the Yorkshire Wolds, England: implications for conservation management.
Subverting the ground: private property and public protest in the sixteenth-century Yorkshire Wolds