^Wright, John Kirtland 'The Years of Henry Grinnell', Geography in the Making: The American Geographical Society 1851-1951 (1952) pp. 14-70. — George Grady Press
^Wright, John Kirtland 'The New Age of Discovery, Geography in the Making: The American Geographical Society 1851-1951 (1952) pp. 71-111. — George Grady Press