Author
- Albertype Co 26 results
- Barone, Robin, 1 results
- Barton, Benjamin Smith, 1766-1815 2 results
- Brauning, Daniel W. 1 results
- Bucks County Historical Society 1 results
- Delaware Valley Ornithological Club 1 results
- Gordon, Seth E. 1 results
- Graham, Daniel A. 2 results
- Graham, Daniel A., 1948- 2 results
- Graves, Joseph H. 1 results
- Harpel, Luther G. 2 results
- Hawk Mountain Sanctuary Association 1 results
- John James Audubon Center at Mill Grove 2 results
- Lee, Daniel, 1 results
- Liberty Bell Bird Club 1 results
- Little Bird Bakery & Cafe 1 results
- Mansfield, Ira F. (Ira Franklin), b. 1842 1 results
- Melick, C.F 1 results
- Mulvihill, Robert S. 1 results
- Pennsylvania 1 results
- Pennsylvania Audubon Society 1 results
- Pennsylvania Game Commission 2 results
- Philadelphia Record 1 results
- Robbins, Franklin, 1917-1994 1 results
- Robin Hood Club 1 results
- Salvin, Osbert, 1835-1898, 1 results
- Smith, Ned, 1919-1985 1 results
- Stone, Witmer, 1866-1939 2 results
- Turnbull, William Paterson, 1830-1871 1 results
- Valley Forge Audubon Society 2 results
- Warren, Benjamin Harry, 1858-1926 2 results
- Watson, Kevin 1 results
- Williams, Toni (Toni Lewis) 1 results
- Willughby society 1 results
- Wilson, Andrew M. 1 results
- Wright, John M. 1 results
- Yerkes, Harman 1 results