Complex sentence: In 1973 the district was merged with the district Nürtingen (without Grafenberg (Baden-Württemberg)), in 1975 two municipalities from the district Böblingen were added to give the district today's borders.
Split into simpler sentences: In 1973 the district was merged with the district Nürtingen (without Grafenberg (Baden-Württemberg)). In 1975 two municipalities from the district Böblingen were added to give the district today's borders.