TY  - BOOK
AU  - Evans , Keith E.
AU  - Kerbs , Roger R.
TI  - Avian use of livestock watering ponds in Western South Dakota
U1  - P 598.41 21st ed.
PY  - 1977///
CY  - Fort Collins
PB  - Rocky Mountain Forest and Range Experiment Station
KW  - Duck brood production
KW  - Waterfowl use
KW  - Wetland habitat
ER  -