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. Technical Session J; B.P.S. Exhibitions Limited;WB Andrews,1980
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.