TY  - RPRT
TI  - Dieldrin and DDT: Effects on sparrow hawk eggshells and reproduction
AU  - Richard D. Porter
AU  - Stanley N. Wiemeyer
PY  - 1969
DO  - 10.1126/science.165.3889.199
UR  - https://pubs.usgs.gov/publication/5221259
ID  - 5221259
ER  -