From the Wikipedia page [1]

Vestfold [²vestfɔl] is a county in Norway, on the western shore of the Oslofjord. It borders Buskerud and Telemark. The county administration is in Tønsberg, Norway's oldest city, and the largest city is Sandefjord. With the exception of the city-county of Oslo, Vestfold is the smallest county in Norway by area.[

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