Sampling Methods for Bats. Thomas, D. W. & West, S. D. Technical Report United States Department of Agriculture Forest Service, 1989.
bibtex   
@TECHREPORT{Thomas1989,
  author = {Donald W. Thomas and Stephen D. West},
  title = {Sampling Methods for Bats},
  institution = {United States Department of Agriculture Forest Service},
  year = {1989},
  file = {Thomas&West1989.pdf:Thomas&West1989.pdf:PDF},
  owner = {Tiago},
  subdatabase = {estimating animal abundance},
  timestamp = {2008.06.29}
}

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