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Dyfyniad Arddull ChicagoCIFA. FAO Fisheries Report N.471: Report of the 3rd Session of the Working Party On Pollution and Fisheries. Rome: FAO, 1991.
Dyfyniad MLACIFA. FAO Fisheries Report N.471: Report of the 3rd Session of the Working Party On Pollution and Fisheries. Rome: FAO, 1991.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.