TY  - RPRT
TI  - Eggshell thinning and residues in mallards one year after DDE exposure
AU  - M. A. Haegele
AU  - Rick H. Hudson
PY  - 1974
DO  - 10.1007/bf02047100
UR  - https://pubs.usgs.gov/publication/5221215
ID  - 5221215
ER  -