| Iaith wreiddiol | Saesneg |
|---|---|
| Tudalennau (o-i) | 25-26 |
| Cyfnodolyn | Environmentalist, official journal of the Institute of Environmental Management and Assessment, Lincoln |
| Cyfrol | 31 |
| Statws | Cyhoeddwyd - 1 Ion 2005 |
Dyfynnu hyn
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