For my convalescence, I had to exercise my voice only with vowels. It is a medical rule after a long loss of voice.
-- Nana Mouskouri
   
Nana Mouskouri   Name:
Nana Mouskouri
Type:
Musician
Nationality:
Greek
Birth:
October 13, 1934
https://www.nutquote.com/quote/Nana_Mouskouri