Data:L11a520/PD Presentation

X₈₁₉₂ X_18,8,19,7 X_16,6,17,5 X_10,16,11,15 X_14,3,15,4 X_4,11,5,12 X_2,20,3,19 X_20,9,21,10 X_12,13,7,14 X_22,18,13,17 X_6,21,1,22