1. Karp, W. A. (ed.) (1990) Developments in Fisheries Acoustics, Rapp. P.-v. Réun. Cons. int. Explor. Mer 189.
2. Urick, R. J. (1975) Principles of Underwater Sound, 2nd ed. McGraw-Hill, New York.
3. Clay, C. S. and Medwin, H. (1977) Acoustical Oceanography, Wiley, New York.
4. Mitson, R. B. (1983) Fisheries Sonar, Blackwell Sci., Oxford.
5. MacLennan, D. N. (1990) ‘Acoustical measurement of fish abundance’, J. Acoust. Soc. Am. 87, 1–15.