 |
| |||
| 層別抽出 River and Water Resources Glossary (Infrastructure Development Institute Japan) | |||
|
stratified sampling : 3 do fraz, 1 tematyki |
| Pospolicie | 3 |
|
| |||
| 層別抽出 River and Water Resources Glossary (Infrastructure Development Institute Japan) | |||
|
stratified sampling : 3 do fraz, 1 tematyki |
| Pospolicie | 3 |