Bonar, S. A., J. S. Fehmi, N. Mercado-Silva. 2011. An overview of sampling issues in species diversity and abundance surveys. Pages 11-24 in A. Magurran and B. McGill, editors, Biological Diversity: Frontiers in Measurement and Assessment. Oxford University Press, New York.
This link will direct you to a non-government website that may have different privacy
policies from those of the U.S. Geological Survey.