TY  - RPRT
TI  - Atlas of gull and tern colonies: North Carolina to Key West, Florida
AU  - John W. Portnoy
AU  - R. Michael Erwin
AU  - Thomas W. Custer
PY  - 1981
UR  - https://pubs.usgs.gov/publication/fwsobs80_05
ID  - fwsobs80_05
ER  -