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Dyfyniad Arddull ChicagoSparre, Per. Introduction to Tropical Fish Stock Assessment. Rome: FAO, 1992.
Dyfyniad MLASparre, Per. Introduction to Tropical Fish Stock Assessment. Rome: FAO, 1992.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.