TY  - RPRT
TI  - Waterfowl productivity and use of nesting structures in the prairie pothole region
AU  - Rex R. Johnson
AU  - Kenneth F. Higgins
AU  - I.J. Ball
AU  - Stan C. Kohn
PY  - 1994
UR  - https://pubs.usgs.gov/publication/70194950
ID  - 70194950
ER  -