TY - RPRT TI - Thermodynamic properties of a geothermal working fluid : 90% isobutane-10% isopentane AU - Gallagher, John S PY - 1987 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS TN 1234 DO - 10.6028/NBS.TN.1234 ER -