TY  - RPRT
TI  - Alula removal technique for identifying wings of released waterfowl
AU  - G.V. Burger
AU  - R. J. Greenwood
AU  - R.C. Oldenburg
PY  - 1970
DO  - 10.2307/3799500
UR  - https://pubs.usgs.gov/publication/1001521
ID  - 1001521
ER  -