. "Bhutanese rupee" . "BTN" . "Bhutanese ngultrum" . . . . . "Chetrum" . . "currency" . "Bhutanese ngultrum" . "Nu" . "Bhutan" . "Ngultrum" . . . . . . . . . . . . . . . "Nu." . "Bhutanese ngultrum#Commemorative notes" .