Author
Merriam, C. Hart (Clinton Hart), 1855-1942
Bailey, Florence Merriam, 1863-1948
49
Bailey, Vernon, 1864-1942
49
Muir, John, 1838-1914
49
Online Archive of California
49
Roosevelt, Theodore, 1858-1919
49
Preble, Edward Alexander, 1871-1957
7
United States. Division of Biological Survey
4
United States. Bureau of Biological Survey
3