| 000 | 00316 a2200109 4500 | ||
|---|---|---|---|
| 008 | 190219b xxu||||| |||| 00| 0 | ||
| 100 | _aDowning, J. A. | ||
| 245 |
_aA manual on methods for the secondary productivity in freshwater / _cJ. A. Downing |
||
| 260 |
_bBlack well Oxford _c1984 |
||
| 300 | _a500p. | ||
| 942 |
_2ddc _cBK |
||
| 999 |
_c8418 _d8418 |
||