Ricker, W. . E. (1971). Methods for assessment of fish production in fresh waters/2nd ed (2nd ed.). Oxford.
Chicago-tyylinen lähdeviittausRicker, W E. Methods for Assessment of Fish Production in Fresh Waters/2nd Ed. 2nd ed. Edinburgh: Oxford, 1971.
MLA-viiteRicker, W E. Methods for Assessment of Fish Production in Fresh Waters/2nd Ed. 2nd ed. Oxford, 1971.
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