Forsman, E. D. (2011). Population demography of northern spotted owls. University of California Press.
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Chicago-čujuhus (17. p.)
Forsman, Eric D. Population Demography of Northern Spotted Owls. Berkeley: University of California Press, 2011.
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MLA-čujuhus (9. p.)
Forsman, Eric D. Population Demography of Northern Spotted Owls. University of California Press, 2011.
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