TY  - RPRT
TI  - Toxicity of lead and proposed substitute shot to mallards.
AU  - J. R. Longcore
AU  - R. Andrews
AU  - L. N. Locke
AU  - George E. Bagley
AU  - L. T. Young
PY  - 1974
UR  - https://pubs.usgs.gov/publication/ssrw183
ID  - ssrw183
ER  -