Christiansen, F. B., & Fenchel, T. M. (1977). Measuring selection in natural populations. Springer-Verlag.
Cita Chicago Style (17a ed.)Christiansen, F. B., y T. M. Fenchel. Measuring Selection in Natural Populations. Berlín: Springer-Verlag, 1977.
Cita MLA (9a ed.)Christiansen, F. B., y T. M. Fenchel. Measuring Selection in Natural Populations. Springer-Verlag, 1977.
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