string quartets nos.1 & 3 string quartets nos.1 & 2 string quartets nos. 1 & 2 string quartet nos.1 & 2 string quartet nos.1 & 9 string quartets nos.5 & 6 string quartets nos.5 & 7 string quartets nos.14 & 15 string quartets nos.1-3 string quartets nos. 1-3