Project aqua a source book of inland waters proposed for conservation
| Prif Awdur: | |
|---|---|
| Awduron Eraill: | |
| Fformat: | Llyfr |
| Iaith: | Saesneg |
| Cyhoeddwyd: |
London
International Biological Programme
c1971.
|
| Cyfres: | IBP Handbook no. 21
|
| Pynciau: |