TY  - RPRT
TI  - Migration behavior of tundra swans from the Yukon-Kuskokwim Delta, Alaska
AU  - Craig R. Ely
AU  - David C. Douglas
AU  - A. C. Fowler
AU  - Colleen A. Babcock
AU  - D.V. Derksen
AU  - John Y. Takekawa
PY  - 1997
UR  - https://pubs.usgs.gov/publication/1008141
ID  - 1008141
ER  -