TY  - RPRT
TI  - Comparison of helicopter and ground surveys of waterfowl broods in southern Ontario
AU  - T.S. Gabor
AU  - J. R. Longcore
AU  - H.R. Murkin
AU  - A.N. Arnason
PY  - 2000
UR  - https://pubs.usgs.gov/publication/5224272
ID  - 5224272
ER  -