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Wessels, Cathy Roheim and Cochrane, Kevern L. and Deere, Carolyn and Wallis, Paul and Willmann, Rolf (2001) Product certification and ecolabelling for fisheries sustainability. FAO Fisheries Technical Paper No.422 . Food and Agricultural Organisation, Rome. ISBN 92-5-104697-2
Wallis, Paul and Flaaten, Ola (2000) Fisheries management costs: Concepts and studies. Organisation for Economic Co-operation and Development (OECD).
Wallis, Paul and Flaaten, Ola Government financial transfers to fishing industries in OECD countries. Organisation for Economic Co-operation and Development (OECD).