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Bonfil, Ramon and Munro, Gordon R. and Sumaila, Ussif Rashid and Valtysson, Hreidar and Wright, Miriam and Pitcher, Tony J. and Preikshot, David and Haggan, Nigel and Pauly, Daniel (1998) Distant water fleets: An Ecological, economic and social assessment. University of British Columbia, Canada.
Bonfil, Ramon (1994) Overview of world elasmobranch fisheries. FAO Fisheries Technical Paper No.341 . Food and Agricultural Organisation (FAO), Rome. ISBN 92-5-103566-0/0429-9345