communications of the "van der waals-fund" Isotherms of methane between 0ÿê and 150ÿêC and densities between 19 and 53 amagat (pressures between 20 and 80 atm) / A. Michels and G.W. … communications of the "van der waals-fund" method for measuring the dew point of natural gases / A. Michels and G.W. Nederbragt communications of the "van der waals-fund" Isothermsof methane-aethane mixtures at 0ÿê, 25ÿê and 50ÿêC up to 60 atmospheres / by A. Michels and G.W. Nederbragt communications of the "van der waals-fund" Isotherms of methane between 0ÿê and 150ÿêC for densities up to 225 amagat : calculated specific heat, energy and entropy in the same region / …