TY  - RPRT
TI  - Influence of radio packs on captive mallards and blue-winged teal
AU  - R. J. Greenwood
AU  - A.B. Sargeant
PY  - 1973
DO  - 10.2307/3799732
UR  - https://pubs.usgs.gov/publication/1001576
ID  - 1001576
ER  -