TY  - RPRT
TI  - Prehunting season banding of mallards and black ducks: Progress report, 1959 and 1960
AU  - R.I. Smith
AU  - A. D. Geis
PY  - 1961
UR  - https://pubs.usgs.gov/publication/5230013
ID  - 5230013
ER  -