TY  - RPRT
TI  - Some observations on the behavior of captive bald eagles before and during incubation
AU  - P.N. Gerrard
AU  - Stanley N. Wiemeyer
AU  - J.M. Gerrard
PY  - 1979
UR  - https://pubs.usgs.gov/publication/5220791
ID  - 5220791
ER  -