- Signature unclear (75)
- Flagg, James Montgomery, 1877-1960 (23)
- Treidler, Adolph, 1886-1981 (23)
- Rockwell, Norman, 1894-1978 (22)
- Falter, John Philip, 1910-1982 (21)
- Wendt, Georg (21)
- Cecil Calvert Beall, 1892-1967 (16)
- Nunney (16)
- Schneller, Ernst, 1890-1944 (16)
- Robbins, Kula (13)
- Wittig-friesen (13)
- Kampmann, Karoly, 1902-1945 (12)
- Christy, Howard Chandler, 1873-1952 (11)
- Davies, Roland, 1904-1993 (11)
- Murphey, Matt (11)
- Thomas, Bert, 1883-1966 (11)
- University of Minnesota (11)
- Dorne, Albert, 1904-1965 (10)
- Falls, Charles Buckles, 1874-1960 (10)
- Jaques, Francis Lee, 1887-1969 (10)