- 8546 - Bijvoet - February 1972 (est)
- 8547 - Schildmeijer - February 1972 (est)
- 8548 - Moorman - February 1972 (est)
- 8549 - Nak - February 1972 (est)
- 8550 - Cort - February 1972 (est)
- 8551 - Oudshoorn - February 1972 (est)
- 8552 - van der Meer - February 1972 (est)
- 8553 - Lambo - February 1972 (est)
- 8554 - van der Hoek, A. - February 1972 (est)
- 8555 - Leuverink - February 1972 (est)
- 8556 - Schür - February 1972 (est)
