| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| The Wellbeing of Nations: A Country-by-Country Index of Quality of Life and the Environment | 978-1-55963-831-9 (1-55963-831-1) | 2001 | |
| What's Wild Life Worth?: Economic Contributions of Wild Plants and Animals to Developing Countries | 978-0-905347-35-6 (0-905347-35-8) | 1982 | Christine Prescott-Allen |
P Allen · R. A. · R Allen · R. P. · Robert A. · Robert Allen · Robert P.