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Duck Populations as Indicators of Landscape
Condition in the Prairie Pothole Region

Acknowledgements

The U.S. Environmental Protection Agency and the U.S. Fish and Wildlife Service co-sponsored this research. L. M. Cowardin designed the sampling frame and procedures. D. Buhl and W. Newton provided statistical assistance. Order of coauthors was alphabetical. We thank D. Naugle, R. Reynolds, and M. Sovada for comments on earlier drafts.
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