| Title | Date | Type | ||
|---|---|---|---|---|
| 26 |
 | Willem J. Kolff, M.D. Ph.D. | 1980 | Image |
| 27 |
 | Willem J. Kolff, M.D. Ph.D. | Image | |
| 28 |
 | Willem J. Kolff, M.D. Ph.D. (1978) | Image | |
| 29 |
 | Willem J. Kolff, M.D., Ph.D. with the Ajax Dialyser (1967) | 1967 | Image |
| 30 |
 | Willem Kolff and Roma Proctor with Burk the Calf | Image | |
| 31 |
 | Willem Kolff, M.D., Ph.D. and William C. DeVries, M.D. (1982) | Image |