海図21-031
| Index No. | 21-031 |
|---|---|
| Country | Russia |
| Area | Sakhalin / Tatar Strait |
| Publisher | Japanese Navy |
| Type | Nautical Chart |
| Scale | 1:18,200-1:500,000 |
| Year | 1921-1938 |
| Number of sheet | 17 |
地図資料目録
東アジア（日本）
| Index No. | 21-031 |
|---|---|
| Country | Russia |
| Area | Sakhalin / Tatar Strait |
| Publisher | Japanese Navy |
| Type | Nautical Chart |
| Scale | 1:18,200-1:500,000 |
| Year | 1921-1938 |
| Number of sheet | 17 |