. Bulletin. Natural history; Natural history. MISSISSIPPI BASIN AREAS Ohio Michigan. "^-Wisconsin GREAT LAKES BASIN AREAS 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 , Fig. 16.—Year-to-year changes in the juvenile percentage in mallards checked in hunters* bags in each of several areas of North America, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Illinois. Natural History Survey Division. Urbana,
. Bulletin. Natural history; Natural history. MISSISSIPPI BASIN AREAS Ohio Michigan. "^-Wisconsin GREAT LAKES BASIN AREAS 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 , Fig. 16.—Year-to-year changes in the juvenile percentage in mallards checked in hunters* bags in each of several areas of North America, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Illinois. Natural History Survey Division. Urbana, State of Illinois, Dept. of Registration and Education, Natural History Survey Division
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
