TY  - RPRT
TI  - Regionwide polygyny in willow flycatchers
AU  - James A. Sedgwick
AU  - Fritz L. Knopf
PY  - 1989
DO  - 10.2307/1368329
UR  - https://pubs.usgs.gov/publication/70123418
ID  - 70123418
ER  -