Cornell University Library Digital Collections
- Gilbreth, Frank Bunker, 1868-1924.2
- Emerson, Harrington, 1853-1931.1
- Florence, P. Sargant 1890-1
- Gilbreth, Lillian Moller, 1878-1972.1
- Goldmark, Josephine Clara, 1877-1950.1
- Kelly, Roy Willmarth. 1
- Lee, Frederic S. 1859-1939.1
- Vernon, Horace Middleton, 1870-1
