(Vapour + liquid) equilibrium data for the azeotropic {1,1-difluoroethane (R152a) + 1,1,2,2-Tetrafluoroethane (R134)} system at various temperatures from (258.150 to 288.150)K Guo, H.; Gong, M.; Dong, X.; Wu, J.; The Journal of Chemical Thermodynamics 2012, 54, 129-133