Data:L10a174/PD Presentation

X₆₁₇₂ X₂₅₃₆ X_18,11,19,12 X_10,3,11,4 X_4,9,1,10 X_14,7,15,8 X_8,13,5,14 X_20,15,17,16 X_16,19,13,20 X_12,17,9,18