Data:L10a2/PD Presentation

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