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Crosby, A. W. (1986). Ecological imperialism: The biological expansion of Europe 900-1900 (1st Ed.). Cambridge: Cambridge University Press.

Crosby, Alfred W. Ecological Imperialism: The Biological Expansion of Europe 900-1900. 1st Ed. Cambridge: Cambridge University Press, 1986.

Crosby, Alfred W. Ecological Imperialism: The Biological Expansion of Europe 900-1900. 1st Ed. Cambridge: Cambridge University Press, 1986.