1. Portrait photograph of Erik Thorbecke Collection: Images from the Rare Book and Manuscript Collections Location: Ithaca, New York Date: 2000-05-11 Format: Image Creator: Cornell University, Media Services, Photo Section
2. Paul McIsaac, Prof. of Electrical Engineering. Collection: Images from the Rare Book and Manuscript Collections Location: Ithaca, New York Date: 2000-05 Format: Image Creator: Cornell University, University Photography
3. Computer Science Department Portrait Wall Collection: Campus Artifacts, Art & Memorabilia Location: Upson Hall, 4th Floor Lobby, Cornell University Date: 2003-10 2012-07-31 Format: Image
4. Portrait of John G. Ackerman Collection: Images from the Rare Book and Manuscript Collections Date: Unknown Format: Image Creator: Don Albern