Belwin

year of pub­li­ca­ti­onISBNauthor(s)title
1973978-91-561-8136-8John W. SchaumJohn W. Schaum Piano Course (Primer): Pre A, the Green Book
  ''978-91-561-8138-2John W. SchaumJohn W. Schaum Piano Course B: The Blue Book- Leading to the Mastery of the Instrument