Graber, R.R. 1976. Mississippi River heron census IV. Unpublished. 

 Illinois Natural History Survey. Urbana, Illinois. 



Gray, A., B.L. Robinson, and M.L. Fernald. 1908. Gray's new manual 



of botany. Seventh edition. American Book Co. New York. 926 p. 



Green, W.E. 1960. Ecological changes on the Upper Mississippi River 



Fish and Wildlife Refuge since inception of the 9-foot channel. Revised. 

 U.S. Department of Interior, Fish and Wildlife Service. 14 p. 



Greenbank, J.T. 1946. Effects of midwinter drawdowns of the upper 

 Mississippi River on aquatic wildlife. In: Keenlyne, K.D., ed. 

 Upper Mississippi River Conservation Committee investigational 

 reports. Upper Mississippi River Conservation Committee. 179 p. 



Gunter, G. 1957. Wildlife and flood control in the Mississippi valley. 

 Transactions of the North American Wildlife Conference 22: 189-196. 



Helms, D.R. 1969. Habitat use by Mississippi River anglers. Iowa 



Conservation Commission Quarterly, Biological Reports 21(1): 33-54. 



Hoffmeister, D.F. and CO. Mohr. 1972. Fieldbook of Illinois mammals. 

 Dover Publications, Inc. New York. 233 p. 



Hooker, E.H. 1897. The suspension of solids in flowing water. Trans- 

 actions of American Society of Civil Engineers 36: 239-324. 



Hubley, R.C., Jr. 1961. Harvest and movement of channel catfish 



in the upper Mississippi River. Wisconsin Conservation Department, 

 Fish Management Division. Investigational Memorandum No. 12. 

 11 p. 



Hunt, B.P. 1953. The life history and economic importance of a bur- 

 rowing mayfly, Hexagenia limbata , in southern Michigan lakes. 

 Michigan Department of Conservation Bulletin, Institute for 

 Fisheries Research 4. 151 p. 



Jackson, H.O. and W.C. Starrett. 1959. Turbidity and sedimentation at 

 Lake Chautauqua, Illinois. Journal of Wildlife Management 23(2): 

 157-168. 



Johnson, J.H. 1976. Effects of tow traffic on the resuspension of 

 sediments and on dissolved oxygen concentrations in Illinois 

 and upper Mississippi Rivers under normal pool conditions. U.S. 

 Army Engineer Waterways Experiment Station, Environmental Effects 

 Laboratory. Vicksburg, Mississippi. Technical Report Y-76-1. 

 181 p. 



202 



