Data:L10a33/PD Presentation

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