Data:10 150/PD Presentation

X₄₂₅₁ X₈₄₉₃ X_5,12,6,13 X_9,17,10,16 X_17,1,18,20 X_13,19,14,18 X_19,15,20,14 X_15,11,16,10 X_11,6,12,7 X₂₈₃₇