LITERATURE CITED 



Bengston, S. A. 1966. Field studies on the harlequin duck 

 in Iceland. Wildfowl Trust Annual Report. 17:79-94 



Bengston, S. A. 1972. Breeding ecology of the harlequin 

 duck in Iceland. Ornis Scand. 3:1-19 



Bengston, S. A. and S. Ulf strand 1971. Food resources and 

 breeding frequency of the harlequin duck in Iceland. 

 Oikos 22:235-239 



Carlson, J. C. 1990. Results of harlequin duck surveys in 



1990 on the Flathead National Forest, Montana. Montana 

 Natural Heritage Program report, Helena, MT . 32 pp. 



Cassirer, E. F. 1989. Distribution and status of harlequin 



ducks on the Nez Perce National Forest in Idaho. Idaho 

 Dept . of Fish and Game, Boise, ID. 13 pp. 



Dzinbal, K. A. 1982. Ecology of harlequin ducks in Prince 

 William Sound, Alaska during summer. M.S. thesis. 

 Oregon State University, Corvallis, OR. 89 pp. 



Kuchel, C. R. 1977. Some aspects of the behavior and ecology 

 of harlequin ducks breeding in Glacier National Park, 

 Montana. M.S. thesis, University of Montana, Missoula, 

 MT. 14 7 pp. 



Miller, V. E. 1988. Harlequin ducks 1988 results of field 

 surveys in west-central Montana. Unpublished report. 



Miller, V. E. 1989. Field survey report harlequin duck, 



Lower Clark Fork River drainage, west-central Montana. 

 Unpublished report. 38 pp. 



Robbins, C. R. and R. W. Crawford 1954. A short accurate 

 method for estimating the volume of stream flow. 

 Journal of Wildlife Management, pp 366-369. 



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