TY  - RPRT
TI  - First breeding records of whooping swan and brambling in North America at Attu Island, Alaska
AU  - P.W. Sykes
AU  - D.W. Sonneborn
PY  - 1998
DO  - 10.2307/1369909
UR  - https://pubs.usgs.gov/publication/5223432
ID  - 5223432
ER  -