Data:L10a167/PD Presentation

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