IMPROVEMENT OF THE REDLICH-KWONG EQUATION OF STATE BY MODIFICATION OF CO-VOLUME PARAMETER - Ratnawati, Ratnawati; Department of Chemical Engineering, Universitas Diponegoro, Semarang, Indonesia Jl. Prof. Soedarto, SH, Tembalang, Semarang, Tel./Fax.: 62-24-7460058 (Dept. of Chemical Engineering, Diponegoro University, 2012)