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References
Van Valen, L. M. in Conceptual Issues in Ecology (ed. Saarinen, E.) (Reidel, Dordrecht, in the press).
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VALEN, L. A pitfall in random sampling. Nature 295, 171 (1982). https://doi.org/10.1038/295171a0
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DOI: https://doi.org/10.1038/295171a0
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