1. A field code of practice for proving turbine displacement meters with prover pipes (1979) (London: Institute of Petroleum).
2. API Standard 2531 (1963) Mechanical displacement meter provers (now being superseded by Chapter 4.2 in the new API Manual).
3. ASTM Standard D 3195–73 Recommended practice for rotameter calibration.
4. Brain, T. J. S. (1978) Reference standards for gas flow measurement. Measurement and Control
11 No. 8, 283–288.
5. Collins, W. T. and Selby, T. W. (1965) Report No. K-1632, A gravimetric gas flow standard — Parts
1 and 2(Oak Ridge: Union Carbide Corp., Nuclear Division).