1. API Project 62,1971
2. API Project 44,1980
3. American Society of Refrigeration Engineering, no date. Properties of Propane, Circular 9.
4. The heat capacity and entropy, heat of fusion and vaporization, and the vapor pressure of n-Butane;Aston;J. Am. Chem. Soc.,1917
5. A wide range boiling point conversion chart for hydrocarbons and petroleum products;Beale;J. Inst. Petrol. Tech.,1935