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Ronald E. Reynolds, Terry L. Shaffer, Randy W. Renner, Wesley E. Newton, Bruce D. J. Batt, Impact of the Conservation Reserve Program on Duck Recruitment in the U.S. Prairie Pothole Region, The Journal of Wildlife Management, Vol. 65, No. 4 (Oct., 2001), pp. 765-780
Reynolds et al. (Mon,) studied this question.
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