TY  - RPRT
TI  - Mercury residues in pintails breeding in North Dakota
AU  - Gary L. Krapu
AU  - G.A. Swanson
AU  - H.K. Nelson
PY  - 1973
DO  - 10.2307/3800131
UR  - https://pubs.usgs.gov/publication/1001287
ID  - 1001287
ER  -