books.google.co.za - The Subject Of Compressible Flow Or Gas Dynamics Deals With The Thermo-Fluid Dynamic Problems Of Gases And Vapours. It Is Now An Important Part Of The Undergraduate And Postgraduate Curricula. Fundamentals Of Compressible Flow Covers This Subject In Fourteen Well Organised Chapters In A Lucid Style....http://books.google.co.za/books/about/Fundamentals_Of_Compressible_Flow.html?id=_NCz9iZIugYC&q=quantities&utm_source=gb-gplus-shareFundamentals Of Compressible Flow