N.R. · Nils Ringertz · R.R.
| title | ISBN-13 (ISBN-10)  | year of publica- tion  | other author(s) | 
|---|---|---|---|
| Cancer incidence in Finland, Iceland, Norway and Sweden: A comparative study | 978-87-16-00900-5 (87-16-00900-2)  | 1971 | |
| Cell Hybrids | 978-0-12-589150-9 (0-12-589150-4)  | 1976 | Robert E. Savage |