TY - RPRT TI - The equation of state of isobutane : an interim assessment AU - Waxman, Meyer AU - Davis, Harry A AU - Sengers, J M H Levelt AU - Klein, Max PY - 1981 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS IR 79-1715 DO - 10.6028/NBS.IR.79-1715 ER -