References

= References =

Cain, M.L., Hacker, S.D. and Bowmar, W.D. (2008) //Ecology//. W. H Freeman and Company. New York, NY. 623pp. Whalley, K., Neville, C., Robertson, P. and Rickard, G. (2007) //Science Focus 2//. Pearson Education, Australia.

These texts was used to check facts contained in the revision exercises but were not used directly as source material.