▁produ ctions ▁for ▁the ▁Holland ▁Festival . ▁ ▁In ▁the ▁sum mers ▁of ▁ 1 9 6 0 ▁and ▁ 1 9 6 1 , ▁he ▁served ▁as ▁a ▁coach ▁and ▁assist ed ▁Hans ▁Kn app ert s bus ch ▁at ▁the ▁Bay re uth ▁Festival , ▁and ▁in ▁ 1 9 6 1 ▁was ▁assistant ▁conduct or ▁to ▁Fer enc ▁Fr ics ay ▁for ▁the ▁Sal zburg ▁Festival ▁production ▁of ▁Moz art ’ s ▁" Id om ene o ". ▁ ▁He ▁continued ▁to ▁assist ▁Fr ics ay ▁both ▁in ▁Sal zburg ▁and ▁in ▁Berlin ▁with ▁the ▁R I AS ▁Sym phony ▁Orchestra ▁and ▁Deutsche ▁Gr amm oph on ▁through ▁ 1 9 6 4 . ▁ ▁In ▁ 1 9 6 5 , ▁Er ős ▁came ▁to ▁the ▁United ▁States ▁for ▁the ▁first ▁time ▁at ▁the ▁inv itation ▁of ▁George ▁Sz ell ▁to ▁work ▁with ▁him ▁and ▁the ▁Cleveland ▁Orchestra ▁as ▁a ▁K ulas ▁Foundation ▁Fellow . ▁ ▁His ▁principal ▁appoint ments ▁were ▁as ▁Music ▁Director ▁and ▁Con duct or ▁of ▁the ▁Mal m ö ▁Sym phony ▁Orchestra ▁( 1 9 6 6 – 6 9 ) ▁in ▁Sweden , ▁the ▁Australian ▁Broadcast ing ▁Commission ▁Or ch est ras ▁( 1 9 6 7 – 6 9 , ▁Sydney ▁and ▁Melbourne ; ▁ 1 9 7 5 – 7 9 , ▁Per th ), ▁the ▁San ▁Diego ▁Sym phony ▁and ▁La ▁J ol la ▁Chamber ▁Orchestra ▁( 1 9 7 1 – 1 9 8 0 ), ▁and ▁the ▁A al