1. Selectivity of towed net samplers;Barkley;Fish. Bull.,1972
2. Avoidance of samplers;Clutter,1968
3. Trawl drag area and netting geometry;Dickson;Institute of Fishery Technology Research, Bergen, Technical Report,1980
4. Statistics for research;Dowdy,1983
5. Some measurements of flow inside codends and a pelagic net;Ferro;Scottish Fisheries Working Paper No. 10/88,1988