books.google.com.br/books?id=wPGsYYVEMqcC&lpg=PP1&dq=espanhol&pg=PP1#v=onepage&q&f=false
books.google.com.br/books?id=gh4eIDB_atMC&lpg=PP1&dq=gram%C3%A1tica%20descriptiva%20de%20la%20lengua%20espa%C3%B1ola&pg=PT10#v=onepage&q=gram%C3%A1tica%20descriptiva%20de%20la%20lengua%20espa%C3%B1ola&f=false
books.google.com.br/books?id=E1vsk1dkLQ0C&lpg=PP1&pg=PP1#v=onepage&q&f=true
