R. F. · R. L · Richard F. · Richard L.
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Nature, God and Humanity: Envisioning An Ethics Of Nature | 978-0-521-00970-6 (0-521-00970-7) | 2002 |
| Nature, God and Humanity: Envisioning an Ethics of Nature | 978-0-521-81122-4 (0-521-81122-8) | 2002 |