. Bulletin. Natural history; Natural history. STATE OF ILLINOIS DwiGHT H. Green, Governor DEPARTMENT OF REGISTRATION AND EDUCATION Frank. G. Thompson, Director NATURAL HISTORY SURVEY DIVISION Theodore H. Prison, Chief Volume 22 B U L L E TI N Article 2 Studies of North American Plecoptera With Special Reference to the Fauna of Illinois T. H. PRISON. Primed by Authority of the State oj Illinois URBAN A, ILLINOIS September 1942. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrat
. Bulletin. Natural history; Natural history. STATE OF ILLINOIS DwiGHT H. Green, Governor DEPARTMENT OF REGISTRATION AND EDUCATION Frank. G. Thompson, Director NATURAL HISTORY SURVEY DIVISION Theodore H. Prison, Chief Volume 22 B U L L E TI N Article 2 Studies of North American Plecoptera With Special Reference to the Fauna of Illinois T. H. PRISON. Primed by Authority of the State oj Illinois URBAN A, ILLINOIS September 1942. 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
