TY  - RPRT
TI  - The effect of variable spring water conditions on mallard reproduction
AU  - Gary L. Krapu
AU  - Albert T. Klett
AU  - Dennis G. Jorde
PY  - 1983
DO  - 10.1093/auk/100.3.689
UR  - https://pubs.usgs.gov/publication/1001537
ID  - 1001537
ER  -