Hellevik, O (1977): Forskningsmetoder i sociologi och statsvetenskap. Natur och Kultur, Lund, Sweden. (Title: Research methods in Sociology and Political Science)
Nielsen, L.A. & D.L. Johnson (eds) (1983): Fisheries Techniques. The American Fisheries Society, Bethesda, Maryland, USA.
Van den Avyle, M.J. (1986): Measuring angler effort, success and harvest. From: Reservoir Fisheries Management for the 80's by Hall, G.E. and Van Den Avyle, M.J. (eds) (1986). American Fisheries Society, Maryland, USA.
