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D., Lluch-Belda and R.J.M, Crawford and T., Kawasaki and A.D, MacCall and R.H, Parrish and R.A, Schwartzlose and P.E, Smith (1989) World-wide fluctuations of sardine and anchovy stocks: The Regime problem. South African Journal of Marine Science, United Kingdom (UK). ISBN 0257-7615