. . . . . "1919" . . . . . . . . . . "Frances Barton Gummere" . . . "Francis Barton Gummere" . . . . . "Gummere's" . "classification scheme based upon the ballad structure and form" . "Francis B Gummere" . "Gummere" . . . . . "Francis Barton Gummere" . . "1855" .