| Answer | Crossword Clue |
|---|---|
| DESNA | 550-mile tributary of the Dnieper. |
| NAPO | 550-mile river, tributary of the Amazon. |
| DESNA | Main tributary of the Dnieper River. |
| ODER | 550-mile river to the Baltic. |
| ISERE | 150-mile tributary of the Rhone. |
| SURA | 500-mile tributary of the Volga. |
| HAN | 900-mile tributary of the Yangtze. |
| OKA | 950-mile tributary of the Volga. |
| DRAVA | 450-mile tributary of the Danube. |
| OSAGE | 500-mile tributary of the Missouri. |
| UELE | 700-mile river, tributary of the Ubangi. |
| UELE | 700-mile tributary of the Ubangi River. |
