Little, M. (1976). Ecology, Energetics and Human variability. W.M.C Brown Company.
Chicago-čujuhus (17. p.)Little, Michael. Ecology, Energetics and Human Variability. NULL: W.M.C Brown Company, 1976.
MLA-čujuhus (9. p.)Little, Michael. Ecology, Energetics and Human Variability. W.M.C Brown Company, 1976.
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