TY  - RPRT
TI  - Breeding canvasbacks: a test of a habitat model
AU  - Douglas H. Johnson
AU  - M.C. Hammond
AU  - T. L. McDonald
AU  - C.L. Nustad
PY  - 1989
UR  - https://pubs.usgs.gov/publication/1001536
ID  - 1001536
ER  -