Data:L10a68/PD Presentation

X₈₁₉₂ X_2,9,3,10 X_10,3,11,4 X₆₇₁₈ X_16,13,17,14 X_14,6,15,5 X_4,16,5,15 X_20,18,7,17 X_18,12,19,11 X_12,20,13,19