original: in 1975 these two districts were merged to form today 's district .
simplifications: in 1975 these two districts came together to form today 's district . in 1975 , these two districts were merged and today 's district was formed . in 1975 these two districts were merged to form today 's district . the two disctricts joined in 1975 to become the district it is today . in 1975 these two districts were merged to form today 's one district . these two districts were merged to form today 's district in 1975 . in 1975 , these two districts were combined to form today 's districts . in 1975 these two districts were put together to form today 's district .