Greenspan and Tschiegg (1959): Tables of c vs T for distilled water, 0<T<100 deg C; no pressure is given and it is presumably standard atmospheric P. Also given is a ploynomial fit with standard deviation 0.026 m/sec or 17 ppm.
Wilson (1960a): Tables of c for seawater, -3 < T < 30 deg C; 1.033 (=1 atm)< P < 1000 kg/cm2; 33 < S < 37 ppt. Note that P is absolute pressure. A polynomial fit is reported with standard deviation 0.22 m/sec.
Wilson (1960b): Tables of sound speed in distilled water, for 0 < T < 100 degC, 14.7 < P < 14,000 psia (ie, 1~1000 atm). The accuracy is 0.1 ppt.
Wilson (1960c): A brief note giving an updated fit equation covering a wider range of parameters (especially salinity): -4 < T < 30 deg C, 1.0 < P < 1000 kg/cm2, 0 < S <37 ppt.
Del Grosso (1974): Provides a fit formula and tables of differences relative to results of previous formulas. Ranges are not given explicitly but tables in the paper cover 0 < T < 35 degC, 0 < S < 43 ppt, 0 < P < 1000 kg/cm2. Note that he uses gauge pressure, ie P=0 corresponds to 1 atm = 1.033 kg/cm2 absolute.
Chen and Millero (1977): Tables and fit for 0 < T < 40 deg C, 0 < P < 1000 bars, 5 < S < 40 ppt. Note pressure is gauge pressure (P=0 corresponds to 1 atm). Standard deviation of fit is 0.19 m/sec.
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Глупостта е също толкова безграни4на,колкото и мъдростта