Books, Brochures, and Chapters>Book:  Osborn, Henry Fairfield (1925), The earth speaks to Bryan, Retrieved on 2012-06-09

Source Material [books.google.com]

Periodicals>Journal Article:  Osborn, Henry Fairfield (1936), Henry Fairfield Osborn, Supplement to Natural History, (Feb 1936), 37:2, 133-34., Retrieved on 2012-06-09

Periodicals>Newspaper Article:  Osborn, Henry Fairfield (1922), Evolution and Religion, New York Times , (5 Mar 1922), 91., Retrieved on 2012-06-09