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Dyfyniad Arddull ChicagoLaevastu, Taivo, and Herbert A. Larkins. Marine Fisheries Ecosystem: : Its Quantitative Evaluation and Management. England: Fishing news book, 1981.
Dyfyniad MLALaevastu, Taivo, and Herbert A. Larkins. Marine Fisheries Ecosystem: : Its Quantitative Evaluation and Management. Fishing news book, 1981.
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