TY  - RPRT
TI  - Marine birds of the southwestern United States and Gulf of Mexico. Part II, Anseriformes
AU  - R. B. Clapp
AU  - D. Morgan-Jacobs
AU  - Richard C. Banks
PY  - 1982
UR  - https://pubs.usgs.gov/publication/5230244
ID  - 5230244
ER  -