Reference Label	Details
est unc	estimated uncertainty
Martin 2006a	J. M. L. Martin, J. Mol. Struct. (TheoChem) 771, 19-26 (2006) Heats of Formation of Perchloric Acid, HClO4, and Perchloric Anhydride, Cl2O7. Probing the Limits of W1 and W2 Theory