TY  - RPRT
TI  - Aging small Canada geese by neck plumage
AU  - K.F. Higgins
AU  - L.J. Schoonover
PY  - 1969
DO  - 10.2307/3799675
UR  - https://pubs.usgs.gov/publication/1001476
ID  - 1001476
ER  -