1. Theoretical uncertainty of orifice flow measurement;Hall,1988
2. The virial coefficients of pure gases and mixtures: a critical compilation;Dymond,1980
3. PVT measurements of CO2 + N2 and an equation of state development for natural and hydrocarbon gases;Brugge,1989
4. The air density equation and the transfer of the mass unit;Jones;J. Res. NBS,1978
5. Gas quality and energy measurement;Van Meter,1989