Sutherland, W. J. (1996). Ecological census techniques: : a hand book. Cambridge University Press.
Dyfyniad Arddull ChicagoSutherland, William J. Ecological Census Techniques: : A Hand Book. Cambridge University Press, 1996.
Dyfyniad MLASutherland, William J. Ecological Census Techniques: : A Hand Book. Cambridge University Press, 1996.
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