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Bibliography
1. Cardarelli, F. (1998), Scientific Unit Conversion, Springer-Verlag (London).
2. Lindeburg, M.R. (1993), Engineering Unit Conversions, 3rd ed., Professional Publications (Belmont, CA).
3. Norton, P.B., Esposito, J.J. (officers) (1994), Encyclopaedia Britannica, 15th ed., Encyclopaedia Britannica, Inc. (Chicago).
4. Pennycuick, C.J. (1988), Conversion Factors: SI Units and Many Others, University of Chicago Press.