TY  - RPRT
TI  - Twin embryos in a peregrine falcon egg
AU  - O. H. Pattee
AU  - W.G. Mattox
AU  - W.S. Seegar
PY  - 1984
DO  - 10.2307/1367013
UR  - https://pubs.usgs.gov/publication/5221918
ID  - 5221918
ER  -