G.W. · K. W. · Ken G. Willis · Kenneth G. Willis
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Economic Valuation of the Environment: Methods and Case Studies | 978-1-84064-327-5 (1-84064-327-7) | 2000 | Guy Garrod |
| Environmental Valuation | 978-1-85898-723-1 (1-85898-723-7) | 1999 | etc. |