Data:L10a170/PD Presentation

X₆₁₇₂ X_12,6,13,5 X₈₄₉₃ X_2,16,3,15 X_16,7,17,8 X_14,19,11,20 X_20,13,15,14 X_18,10,19,9 X_10,12,5,11 X_4,17,1,18