TY  - RPRT
TI  - Breeding biology and habitat use of black ducks
AU  - R. Owen
AU  - J. Longcore
AU  - J. Ringelman
AU  - K. Reinecke
AU  - K. Hendrix
PY  - 1989
UR  - https://pubs.usgs.gov/publication/5222785
ID  - 5222785
ER  -