@misc{indiciaed4b643273a07, title = {Comparison of helicopter and ground surveys of waterfowl broods in southern Ontario}, author = {T.S. Gabor and J. R. Longcore and H.R. Murkin and A.N. Arnason}, year = {2000}, url = {https://pubs.usgs.gov/publication/5224272}, note = {Source identifier: 5224272} }