Rivkin, S. L., G. V. Troyanovskaya, and T. S. Akhundov, Teplofiz. Vys. Temp. 2, 219 (1964); High Temp. 2, 194 (1964).

13 of 18 psigma data were selected to develop the IAPWS-95 Formulation.
Temperatures were converted to the ITS-90 scale.
 
 T / K           psigma / MPa  Author                             No.
  645.9535        21.763898340 RIVKIN et al. (1964)               001
  645.9835        21.771743660 RIVKIN et al. (1964)               002
  646.0735        21.794298960 RIVKIN et al. (1964)               003
  646.0935        21.799202280 RIVKIN et al. (1964)               004
  646.1035        21.803124940 RIVKIN et al. (1964)               005
  646.1035        21.804105610 RIVKIN et al. (1964)               006
  646.1635        21.816854250 RIVKIN et al. (1964)               007
  646.1735        21.819796250 RIVKIN et al. (1964)               008
  646.1735        21.820776910 RIVKIN et al. (1964)               009
  646.1935        21.826660910 RIVKIN et al. (1964)               010
  646.2235        21.833525560 RIVKIN et al. (1964)               011
  646.2235        21.834506230 RIVKIN et al. (1964)               012
  647.0834        22.061039840 RIVKIN et al. (1964)               013
