Ideal Gas 2 : A theoretical gas that perfectly obeys PV=RT/m, where V is the specific volume, T is the absolute temperature, R is the universal gas constant, and m is the molecular weight
George E. King Engineering, 5000 Oilfield Terms: A Glossary of Petroleum Engineering Terms, Abbreviations and Acronyms, US 2010. http://gekengineering.com/Downloads/Free_Downloads /Glossary_of_Petroleum_Engineering_Terms_25_August _2010.pdf, (Oil - Amer) {593}