String Quartets opp.127 & 132 String quartets opp. 12 & 13 string quartets opp.51 & 105 String Quartets Op.127&132 string quartets opp.34 & 96 String quartets nos. 1 & 2 String Quartets 10 & 13 String quartet op. 6, 1 String quartet op. 6, 2 String quartets Nos. 1 & 2