TY  - RPRT
TI  - Dieldrin and eggshell thickness in ducks.
AU  - P N Lehner
AU  - A Egbert
PY  - 1969
DO  - 10.1038/2241218a0
UR  - https://pubmed.ncbi.nlm.nih.gov/5358350/
ID  - 5358350
ER  -