| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Ethical Choice | 978-0-02-902060-9 | 1970 | John Boyd Orr |
| Handbook in social philosophy | 978-0-02-307820-0 | 1979 | |
| Perspectives in philosophy: A book of readings | 978-0-03-089645-3 | 1975 | |
| Perspectives in philosophy;: A book of readings | 978-0-03-076755-5 | 1969 | |
N. Beck · R. B · R. Beck · R.N. · R. N. Beck · R. Nelson · Robert B. · Robert Beck · Robert N. · Robert N. Beck · Robert Nelson