. Bulletin. Natural history; Natural history. STATE OF ILLINOIS DEPARTMENT OF REGISTRATION AND EDUCATION DIVISION OF THE NATURAL HISTORY SURVEY STEPHEN A. FORBES. Chief Vol. XIV. BULLETIN Article IV. Changes in the Bottom and Shore Fauna of the Middle lUinois River and its Con- necting Lakes since 1913 —1915 as a Result of the Increase, South- ward, of Sewage Pollution BY ROBERT E. RICHARDSON. PRINTED BY AUTHORITY OF THE STATE OF ILLINOIS URBANA. ILLINOIS December, 1921. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability -
. Bulletin. Natural history; Natural history. STATE OF ILLINOIS DEPARTMENT OF REGISTRATION AND EDUCATION DIVISION OF THE NATURAL HISTORY SURVEY STEPHEN A. FORBES. Chief Vol. XIV. BULLETIN Article IV. Changes in the Bottom and Shore Fauna of the Middle lUinois River and its Con- necting Lakes since 1913 —1915 as a Result of the Increase, South- ward, of Sewage Pollution BY ROBERT E. RICHARDSON. PRINTED BY AUTHORITY OF THE STATE OF ILLINOIS URBANA. ILLINOIS December, 1921. 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
