"Crowell-Collier Publishing Company Records, 1931-1955"(PDF). Guide to the Crowell-Collier Publishing Company Records. The New York Public Library Humanities and Social Sciences Library Manuscripts and Archives Division. Archived(PDF) from the original on March 4, 2016. Retrieved April 23, 2016.
"Crowell-Collier Publishing Company Records, 1931-1955"(PDF). Guide to the Crowell-Collier Publishing Company Records. The New York Public Library Humanities and Social Sciences Library Manuscripts and Archives Division. Archived(PDF) from the original on March 4, 2016. Retrieved April 23, 2016.