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Duck Production Studies on the Prairie Potholes of South Dakota

Description: From introduction: "Determine the extent, distribution, and numbers of small water areas formerly and now present in the prairie pothole region of the Dakotas and Minnesota; to determine their importance to wildlife, the factors bringing about their disappearance, and to develop, if possible, methods for their preservation, if that appears warranted."
Date: March 1956
Creator: Evans, Charles D.
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