String Quartet no.7 in F sharp minor,op.108 String quartet No.7 in F sharp minor, op.108 String Quartet No.7 in F-sharp minor,op.108 String quartet no. 14 in C sharp minor, op. 131 String Quartet No.14 in C sharp minor,Op.131 String quartet no. 14 in C-sharp minor, op. 131 String quartet No.14 in F sharp major, op.142 String Quartet No.14 in C sharp minor Op.131 String quartet No. 14 in C-sharp minor op. 131 String Quartet No.14 in F-sharp major,op.142