Frederick, John H. "Horace Francis Clark." Dictionary of American Biography. Base Set. American Council of Learned Societies, 1928-1936. Reproduced in Biography Resource Center. Farmington Hills, Mich.: Thomson Gale, 2006. http://www.galenet.com/servlet/BioRC.
An electronic version of this text is available at Gale's Biography Resource Center, a subscription database of biographical information available to individuals and institutions that purchase a license for its use. Viewing the electronic version of this text will lead you to an external website. Please report dead links to digitlib@lehigh.edu.
