string quartets opp.51 & 105 String quartets opp. 12 & 13 string quartets opp.34 & 96 String Quartets opp.127 & 132 String quartets nos. 1 & 2 String quartet op. 6, 1 String quartets Nos. 1 & 2 string quartet op.59 no.2 String quartets op. 54 nos. 1-3 String quartets op.18/1 & op.127