The first 50 years of the North American Breeding Bird Survey
Dates
Year
2017
Citation
Sauer, John R, Pardieck, Keith L, Ziolkowski Jr, David J, Smith, Adam C, Hudson, Marie-Anne R, Rodriguez, Vicente, Berlanga, Humberto, Niven, Daniel K, and Link, William A, 2017, The first 50 years of the North American Breeding Bird Survey: The Condor.