TY  - RPRT
TI  - DDE thins eggshells and lowers reproductive success of captive black ducks
AU  - J. R. Longcore
AU  - F. B. Samson
AU  - T.W. Whittendale
PY  - 1971
DO  - 10.1007/bf01796852
UR  - https://pubs.usgs.gov/publication/5221237
ID  - 5221237
ER  -