Duck Production Studies on the Prairie Potholes of South Dakota (open access)

Duck Production Studies on the Prairie Potholes of South Dakota

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.
System: The UNT Digital Library
Summary of Sportsmen's Expenditures: Missouri River Basin (open access)

Summary of Sportsmen's Expenditures: Missouri River Basin

From introduction: "These surveys were for the purpose of determining the average daily expenditure of fisherman or hunters using specific areas, and this daily expenditure was then used to determine the expenditure per pound of fish, or unit of bird or animal bagged,"
Date: March 1957
Creator: Nichilson, A. J.
System: The UNT Digital Library