ake ▁in ▁ 1 9 7 1 . ▁Har per ▁and ▁N ils en ▁along ▁with ▁Finn ▁Kal vik ▁performed ▁together ▁on ▁ 2 3 ▁January ▁ 1 9 7 0 ▁at ▁a ▁concert ▁held ▁in ▁the ▁University ▁of ▁Os lo . ▁Har per ' s ▁visit ▁coinc ided ▁with ▁the ▁emer gence ▁of ▁the ▁Norwegian ▁' folk ▁music ▁wave ' ▁( Vis eb ø l gen ) ▁and ▁the ▁Norwegian ▁Broadcast ing ▁Corporation ▁( NR K ) ▁recorded ▁Har per ▁on ▁the ▁occasion ▁of ▁the ▁concert . ▁Kal vik ▁would ▁later ▁go ▁on ▁to ▁record ▁Norwegian ▁versions ▁of ▁two ▁Har per ▁songs ; ▁" I ▁H ate ▁the ▁White ▁Man " ▁(" Den ▁h v ite ▁man n ") ▁and ▁" Don ' t ▁You ▁Gr ieve " ▁(" K j æ re ▁ikke ▁gr å t "). ▁▁ 1 9 7 0 – 8 0 : ▁The ▁Har vest ▁years ▁With ▁Har per ' s ▁reputation ▁growing , ▁P ink ▁F loyd ' s ▁manager ▁Peter ▁Jen ner ▁signed ▁him ▁to ▁a ▁long - term ▁( and ▁at ▁times ▁confront ational ) ▁deal ▁with ▁E MI ' s ▁' under ground ' ▁subs idi ary , ▁Har vest ▁Records . ▁Over ▁a ▁ten - year ▁period , ▁Har per ▁recorded ▁eight ▁albums ▁at ▁the ▁Ab bey ▁Road ▁Studios ▁for ▁the ▁Har vest ▁label ▁and ▁for ▁much ▁of ▁this ▁period ▁was ▁managed ▁and ▁produced ▁by ▁Jen ner , ▁initially ▁acting ▁for ▁Black hill ▁Enter pr ises . ▁According ▁to ▁Jen ner ,