TY  - RPRT
TI  - Nationwide organochlorine and mercury residues in wings of adult mallard and black ducks during the 1969-70 hunting season
AU  - R.G. Heath
AU  - S.A. Hill
PY  - 1974
UR  - https://pubs.usgs.gov/publication/5221212
ID  - 5221212
ER  -