CMBR distortion concerned with recombination of the primordial hydrogen   plasma
  CMBR distortion concerned with recombination of the primordial plasma is calculated in frequency band from 1 GHz to 100 GHz in the frame of the standard cosmological model for different values of cosmological density parameters: nonrelativistic matter density $\Omega_m$ and baryonic matter density $\Omega_b$. Comparison of these results with observational data which will be obtained from planned experiments may be used for independent determination of the cosmological parameters $\Omega_m$ and $\Omega_b$. 
E.E. Kholupenko, A.V. Ivanchik and D.A. Varshalovich