 |
| |||
| pilot survey; experimental sample survey; exploratory survey; pilot inquiry; pilot sample; sample survey; trial survey | |||
|
pilotundersogelse : 5 短语, 1 学科 |
| 统计数据 | 5 |
|
| |||
| pilot survey; experimental sample survey; exploratory survey; pilot inquiry; pilot sample; sample survey; trial survey | |||
|
pilotundersogelse : 5 短语, 1 学科 |
| 统计数据 | 5 |