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Anonymous. 1987.  Standard operating procedures for aerial waterfowl breeding 
     ground population and habitat surveys in North America.  U.S. Fish and 
     Wildl. Serv., Laurel, Md.  Various pagination

Bobbe, T. 1992.  Real-time differential GPS for aerial surveying and remote 
     sensing.  GPS World 3:18-22.

Cowardin, L. M. 1982.  Some conceptual and semantic problems in wetland 
     classification and inventory.  Wildl. Soc. Bull. 	10:57-60.

-------, V. Carter, F. C. Golet, and E. T. LaRoe.  1979.  Classification of 
     wetlands and deepwater habitats of the United States.  U.S. Fish and Wildl. 
     Serv. FWS/OBS 79/31. 103pp.

Danziger, P. N. 1990.  Picture databases: a practical approach to picture 
     retrieval.  Database 13:13-17.

Estes, J. E., E. J. Hajic, and L. R. Tinney.  1983.  Fundamentals of image 
     analysis: analysis of visible and thermal infrared data.  Pages 987-1124 
     in D. S. Simonett and F. T. Ulaby, eds. Manual of remote sensing, Second 
     ed. Vol. 1.  Am. Soc.  Photogramm., Falls Church, Va.

Everitt, J. H., D. E. Escobar, C. H. Blazquez, M. A. Hussey, and P. R. Nixon.  
     1986.  Evaluation of the mid-infrared (1.45 to 2.0 µm) with a black-and-white 
     infrared video camera.  Photogramm. Eng. Remote Sensing 52:1655-1660.

Graham, L. A.  1993.  Airborne video for near-real-time vegetation mapping.  
     J. For. 91:28-32.

Johnson, D. H., and J. W. Grier.  1988.  Determinants of breeding distributions 
     of ducks.  Wildl. Monogr. 100. 37pp.

King, D., and J. Vlcek.  1990.  Development of a multispectral 	video system and 
     its application in forestry.  Can. J. Remote Sensing 16:15-22.

Lyon, J. G., R. S. Lunetta, and D. C. Williams. 1992.  Airborne multispectral 
     scanner data for evaluating bottom sediment types and water depths of the 
     St. Marys River, Michigan.  Photogramm. Eng. Remote Sensing 58:951-956.

Mausel, P. W., J. H. Everitt, D. E. Escobar, and D. J. King.  1992.  Airborne 
     videography: current status and future perspectives.  Photogramm. Eng. 
     Remote Sensing 58:1189-1195.

Neville, R. A., and I. Powel.  1992.  Design of SFSI: an imaging spectrometer in 
     the SWIR.  Can. J. Remote Sensing 18:210-222.

Nichols, J. D.  1991.  Extensive monitoring programmmes viewed as long-term 
     population studies: the case of North American waterfowl.  Ibis 133
     (Suppl. I):89-98.

Pospahala, R. S., D. R. Anderson, and C. J. Henny.  1974. Population ecology of 
     the mallard: II. Breeding habitat 	conditions, size of the breeding 
     populations and production indices.  U.S. Fish and Wildl. Serv. Resour. 
     Publ. 115. 73pp.

Reynolds, R. E. 1987.  Breeding duck population, production and habitat surveys, 
     1979-85.  Trans. North. Am. Wildl. Nat. Resour. Conf. 52:186-205.

Ritchie, J. C., T. J. Jackson, J. H. Everitt, D. E. Escobar, J. B. Murphey, and 
     E. H. Grissinger.  1992.  Airborne laser: 	a tool to study landscape 
     surface features.  J. Soil Water Conserv. 47:104-107.

Salomonson, V. V., T. J. Jackson, J. R. Lucas, G. K. Moore, A. 	Rango, T. Schmugge, 
     and D. Scholz.  1983.  Water resources assessment.  Pages 1497-1570 in 
     J. E. Estes and G. A. Thorley, eds. Manual of remote sensing, Second ed. 
     Vol. 2.  Am. Soc. Photogramm., Falls Church, Va.

Schowengerdt, R. A. 1983.  Techniques for image processing and 	classification 
     in remote sensing.  Academic Press, New York, N.Y. 249pp.
 
Shaw, S. P., and C. G. Fredine. 1956.  Wetlands of the United States.  U.S. 
     Fish and Wildl. Serv., Circ. 39. 67 pp.

Trimble Navigation, Ltd. 1993.  TANS vector GPS receiver for attitude determination.  
     Trimble Navig., Ltd.,  Sunnyvale, Calif. 2pp.

U.S. Fish and Wildlife Service.  1992.  Status of waterfowl fall flight forecast.  
     U.S. Fish and Wildl. Serv., Laurel, Md. 30pp.