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2. 5Wolf, H., McCarthy, J. R. "Heat Transfer to Hydrogen and Helium with Wall to Fluid Temperature Ratios to 11.09," Research and Development Program on Thixotropic Propellants, Quarterly Progress Report RP-60-12, Aeroprojects, Inc., West Chester, PA, 1960.
3. Simple and Explicit Formulas for the Friction Factor in Turbulent Pipe Flow