TY  - RPRT
TI  - Sources of variation in waterfowl survival rates
AU  - D.G. Krementz
AU  - R. J. Barker
AU  - J.D. Nichols
PY  - 1997
DO  - 10.2307/4089068
UR  - https://pubs.usgs.gov/publication/5223180
ID  - 5223180
ER  -