Waterfowl Communities in the Northern Plains

Acknowledgments

Waterfowl were surveyed and ponds counted by leaders of the Woodworth Field Station, L. M. Kirsch (deceased), K. F. Higgins, and J. M. Callow, and numerous seasonal staff they supervised. I am grateful to all of them. B. R. Euliss prepared the graphics, and J. E. Austin, R. R. Cox, and R. R. Koford provided useful comments on earlier drafts of this report.

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