Internet, http://lccn.loc.gov/n92077350, 2012-02-22
Information trouvée : Ayres, Harry Morgan; univ. prof. of Eng.; b. Oct. 6, 1881; office: Columbia Univ.;
d. Nov. 20, 1948
The pageant of America : a pictorial history of the United States / Ralph Henry Gabriel
editor, Henry Jones Ford, Harry Morgan Ayres, 1925-1929