Johnson, R. H. (1910). Determinate Evolution in the color-pattern of the lady-beetles.
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Chicago-čujuhus (17. p.)
Johnson, Roswell Hill. Determinate Evolution in the Color-pattern of the Lady-beetles. Washington, 1910.
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MLA-čujuhus (9. p.)
Johnson, Roswell Hill. Determinate Evolution in the Color-pattern of the Lady-beetles. 1910.
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