"Cuartetos de cuerda." . . . . . . . "String quartets no. 6" . "String quartet No. 12" . "Notenwerk" . . . . . . "String quartet, no. 12" . . . . . . . . . . . . . . . "String quartet No. 7" . "String quartet No. 6" . "String Quartet no. 4. Miniature score" . "String quartet, no. 7" . . "String quartet no. 7" . "String quartet no. 6" . "String quartet no. 4 [1917]" . . . "String quartet no. 6 [1938]" . . . . "String quartet No. 4" . . . "String quartet no. 12" . "String quartet, no. 4" . "String quartet no. 4" . . . . . . . . . . "String quartett no. 4" . . . . . . "String quartet, n. 4" . "Stringquartet No. 12" . . . . . . . .