LITERATURE CITED 
Aldous, Shaler E, 
1947, Muskrat trapping on Sand Lake National Wildlife Refuge, South Dakota, 
Jour, Wildlife Mgt, 11:77-90. 
Arthur, George C, 
1948, Illinois upper Mississippi wildlife survey, Pittman-Robertson Quarterly 
8(2):175, 
Bellrose, Frank C,, Jr, 
1944, Waterfowl hunting in Illinois: its status and problems, Ill, Nat, Hist, Surv, 
Biol, Notes 17, 35 pp. 
Bellrose, Frank C,, Jr, 
1945, Relative values of drained and undrained bottomland in Illinois, Jour, 
Wildlife Mgt, 9:161-82, 
Bellrose, Frank C,, Jr, 
1947. Analysis of methods used in determining game skill. Jour, Wildlife Mgt. 
11:105-19, 
Bellrose, Frank C,, and Louis G, Brown 
1941, The effect of fluctuating water levels on the muskrat population of the 
Illinois River valley, Jour, Wildlife Mgt, 5:206-12, 
Dozier, Herbert L,, Merle H, Markley, and Leonard M, Llewellyn 
1948, Muskrat investigations on Blackwater National Wildlife Refuge, Maryland, 
1941-1945, Jour, Wildlife Mgt, 12:177-90. 
Gordon, Seth, Jr, 
1941, A sampling technique for the determination of hunter activities and the eco- 
nomics thereof, Jour, Wildlife Mgt. 5:260-78., 
Hewitt, Oliver H, 
1942, Management of an artificial marsh in southern Ontario for ducks and mus = 
krats, N, Am, Wildlife Conf, Trans, 7:277-82, 
Lueth, Francis X, 
1946, Rice Lake wildlife research, Pittman-Robertson Quarterly 6(1):3-4. 
Penfound, William T., and John D, Schneidau 
1945, The relation of land reclamation to aquatic wildlife resources in southeastern 
Louisiana, N. Am, Wildlife Conf, Trans, 10:308-18, 
24 
