1. Aldred R. G., Thurston M. H., Rice A. L., and Morley D. R., 1976, An Acoustically Monitored Opening and Closing Epibenthic Sledge, Deep-Sea Research, 23, 167?174.
2. Andrews, W. B., 1980, Inspection, Maintenance and Repair: Ultrasonic Imaging for Offshore Underwater Operations, in Oceanology International '80, Technical Session J; B.P.S. Exhibitions Limited, 19?28.
3. Anon., 1953, Wratten Light Filters, Kodak, London, 92.
4. Anon., 1968, Bibliography on Underwater Photography and Photogrammetry, Eastman Kodak, New York, 23.
5. Anon., 1986, Underwater Cameras-Product Review, International Underwater Systems Design 8(5), 6?8.