Snow, B. K., Snow, D., & Busby, J. (1988). Birds and berries: A study of an ecological interaction. T & A D Poyser.
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Chicago-čujuhus (17. p.)
Snow, Barbara K., David Snow, juo John Busby. Birds and Berries: A Study of an Ecological Interaction. Calton [Scotland]: T & A D Poyser, 1988.
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MLA-čujuhus (9. p.)
Snow, Barbara K., et al. Birds and Berries: A Study of an Ecological Interaction. T & A D Poyser, 1988.
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