Mohlenbrock, Robert H., 1931- 4
National Audubon Society 3
National Wildlife Federation 3
Roger Tory Peterson Institute 3
Peterson, Roger Tory, 1908- 2
Allen, Richard 1
Arno, Jon 1
Askin, Jayne 1
Beadle, David, 1961- 1
Brodo, Irwin M. 1
Burt, William Henry, 1903- 1
Canadian Museum of Nature 1
Chantler, Phil 1
Cheke, Robert A. 1
Clark, William S., 1937- 1
Crow, Garrett E. 1
Duke, James A., 1929- 1
Duncan, Marion B. 1
Duncan, Wilbur Howard, 1910- 1
Dunkle, Sidney W., 1940- 1
Fassett, Norman C. 1900-1954 1
Forsman, Dick 1
Foster, Steven, 1957- 1
Glassberg, Jeffrey 1
Hellquist, C. B. 1
Hemmerly, Thomas E. 1932- 1
Heukels, Peter 1
Howell, Steve N. G. 1
Hueske, Edward E. 1
Jefferson, Thomas A. 1
Jones, Adrian P. 1
Kazmierczak, Krys 1
Kingdon, Jonathan 1
Klots, Alexander Barrett, 1903- 1
Koff, Clea 1
Kricher, John C. 1
Ladd, Douglas M. 1
Lewington, Ian 1
Mann, Clive F. 1
McFarland, Joe, 1963- 1
McGavin, George 1
McKenny, Margaret 1
Morrison, Gordon 1
Morton Arboretum 1
Mueller, Gregory M. 1
Nicholls, James 1
O'Shea, Mark 1
Oberle, Frank 1
Oliver, A. P. H. 1
Perlo, Ber van 1
Peterson, Roger Troy, 1908- 1
Peterson, Virginia Marie, 1925- 1
Pitman, Robert L. 1
Plotnik, Arthur 1
Rising, Jim 1
Sawyer, John O., 1939- 1
Schmidt, Diane, 1956- 1
Sharnoff, Stephen, 1944- 1
Sharnoff, Sylvia Duran, 1944- 1
Still, Rob 1
Stuart, John David 1
Swash, Andy 1
Tove, Michael H. 1953- 1
Webber, Marc A. 1
Wheeler, Brian K., 1955- 1
Zimmer, Kevin J. 1