Underwater methods
Helfman, G.S. (1983). Underwater methods, in: Nielsen, L.A. et al. Fisheries techniques. pp. 349-369
In: Nielsen, L.A.; Johnson, D.L. (Ed.) (1983). Fisheries techniques. American Fisheries Society: Bethesda. ISBN 0-913235-00-8. 468 pp., more
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