1. Sverdrup, H. U., M. W. Johnson, and R. H. Fleming, 1942, The oceans, their physics, chemistry, and general biology: Englewood Cliffs, N.J., Prentice-Hall, 1060 p.
2. Del Grosso, V. A., 1974, New equation for the speed of sound in natural waters: J. Acoust. Soc, v. 56, p. 1084.
3. Collin Weeks, personal communication, 1983.
4. Multibeam bathymetric swatch survey systems, in Sea-Technology, June 1982, p. 28-31.
5. Dobrin, M. B., 1976, Introduction to geophysical prospecting: 3rd ed., New York, McGraw-Hill, 630 p.