The choir also gave concert tours in Israel ( 1987 ) , Australia ( 1988 ) , and Estonia ( 1989 , 1990 ) under his leadership . Under his supervision , the choir also gave concert tours in Israel ( 1987 ) , Australia ( 1988 ) and Estonia ( 1989 , 1990 ) .
Koir ini juga memberikan konsert jelajah di Israel (1987), Australia (1988), dan Estonia (1989, 1990) di bawah kepimpinannya. Di bawah pengawasannya, koir juga memberikan lawatan konsert di Israel (1987), Australia (1988) dan Estonia (1989, 1990).